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The son of Queen Bean, Prince Peasley is a hero of the Beanbean Kingdom. Despite this even he gets into predicaments that require the Bros. help from time to time.
- 100% Adoration Rating: He's regarded very highly by the Beanbean Kingdom citizens for his mission work and generally being very cool.
- Baleful Polymorph: He is introduced having been transformed into Dragohoho by Cackletta.
- Beat the Curse Out of Him: How Dragohoho is turned back into Peasley.
- Big Damn Heroes: In Bowser's Castle, he swoops in at the last minute to help the Mario Bros. defeat Fawful.
- Bishie Sparkle: Lights up the whole screen.
- Dishing Out Dirt: As Dragohoho, his main attack is spitting rocks at the Mario Bros.
- Distressed Dude: He manages to be turned into a dragon by Cackletta and saved by the Bros. He later gets eaten by the Piranha Bean, and is saved by Luigi.
- Foil: He is the Beanbean counterpart of Mario, but while Mario is a humble, homely Everyman, Peasley is more of an egotistical pretty boy.
- Incredible Shrinking Man: Getting eaten by the Piranha Bean made him shrink. Even his Bishie Sparkle got smaller.
- Living Ship: He flies around everywhere using a strange bean with feathered wings.
- Requisite Royal Regalia: He is always shown wearing a fancy red cape and white gloves.
- Royals Who Actually Do Something: Peasley warns Peach about Cackletta's plans, tries to put a stop to her (and gets turned into a dragon, but points for trying) and instigates the search for the Beanstar pieces.
- Scaled Up: Being forcibly transformed in Dragohoho.
The good-natured ruler of the Beanbean Kingdom, Queen Bean was driven to a mad rampage when Cackletta infected her with a worm. She is eventually snapped out of it by the Bros.
- 100% Adoration Rating: She is apparently quite beloved by her subjects, which is shown during Dream Team's Chain of Deals when you must give a photo of Queen Bean to a homesick Beanish to cheer him up.
- Abnormal Ammo: When her arms are taken out as a boss, she spits beans at the Bros. to attack.
- Big Beautiful Woman: That one homesick Beanish tourist in Dream Team certainly thinks so.
- Brainwashed and Crazy: As well as getting Charles Atlas Superpower.
- The Caligula: Averted, as she seems to be a very effective ruler when snapped out of her rage.
- Cognizant Limbs: Her arms must be taken out before you can attack her proper.
- Reasonable Authority Figure: When not brainwashed by Cackletta.
- Shockwave Stomp: As a boss, she can pound the ground with her fists to create a shockwave.
Queen Bean's cloaked advisor who helps the brothers after they free her from the bowels of the castle. Cackletta disguised herself as her and used her appearance to not only steal Peach's voice, but also trick the Brothers into disabling the security system around the Beanstar, thus getting the plot started.
- Beta Couple: With Toadsworth, as indicated by the last cutscene showing the two hugging affectionately before he has to return to the Mushroom Kingdom.
- Gag Nose: She has a rather large curved nose. Sorta counts as Sinister Schnoz when Cackletta is disguised as her.
- Milking the Giant Cow: Waves her arms in a wizard-like fashion sometimes when saying something dramatic or when agitated.
- Rescue Introduction: She is first met for real (by both the characters and the player) when the Mario Bros. unlock her jail cell. The fact that she talks to them as if she has just met them for the first time is also the first clear indication that the "Lady Lima" you met earlier was actually a fake.
- Treacherous Advisor: Subverted; the "Lady Lima" who betrays you is actually Cackletta, whereas the real Lima helps direct the brothers on where to go next, and helps successfully run the Beanbean kingdom.
Starshade Bros.Two Toad brothers who diligently scout out Stardust Fields. They teach Mario and Luigi the High and Spin Jump moves.
- Color-Coded Characters: One is red, the other is green.
- Disproportionate Retribution: Think some angry turtle guy is whining too loudly? Just fire him out of a cannon!
- Drill Sergeant Nasty: Their main character trait.
Hammerhead Bros.Two master blacksmith who forge the Mario bros hammers and later upgrades them.
- Color-Coded for Your Convenience: Sledge is red, Mallet is green.
- Drop the Hammer: They're hammers that form a hammer by mashing their heads.
- Use Your Head: How they make the hammers.
BlablanadonA large-toothed pterosaur who inhabits Hoohoo Mountain. Initially found tending an egg on the mountain's peak (revealed to hold Peasley in the form of Dragohoho), he later flies the Bros. up to the peak whenever they want.
- Chekhov's Gunman: He flies you up to Bowser's Castle near the end.
Bubbles and BoddleEccentric Beanish brothers, Bubbles is a Chuckola brewer who has been telling the Chuckola Reserve many jokes for many, many years, while Boddle is a Yoshi enthusiast who is planning to open Yoshi Theater.
- Serious Business: Bubbles spends a very long time concocting a special kind of soda, and then has the soda come to life and attack people who try to take it.
- What Happened to the Mouse?: Bubbles vanishes after the Chuckolator fight.
The Jellyfish SistersSister Masseuses who teach the brothers how to use the techniques for Firebrand (Mario) and Thunderhand (Luigi).
- Color-Coded for Your Convenience: Gigi wears a red dress while Merri wears a Green dress.
- Impossible Hourglass Figure: Both of them.
- Meaningful Name: Merri = Mario. Gigi = Luigi. Although the colors are swapped for whatever reason.
- Playing with Fire: Gigi in red.
- Shock and Awe: Merri in Green.
A large, speech-impaired, sidestepper-like hermit crab who lives in Gwarhar Lagoon. He finds a piece of the Beanstar after it breaks apart and with help from his Beanish friends uses it as a star for his Christmas-themed shell. He gets into a fight with the Bros when they come to get the Star Piece, but amends are later made when they replace the lost star with Spangle, a small starfish in need of a stage.
- Attention Whore: His posse are so elated by the Bros. appearance, that they stop decorating his shell and begin gushing. He then loses it and attacks the two.
- Poisonous Person: Spits poison bubbles as an attack.
- Speech Impediment: Uses th- instead of s- when speaking.
Harhall/BleetchA renowned tailor who exhibits a nasty angry side, he has come up with the practice of "Splart" as a complex method of dyeing clothes.
- Ambiguously Gay: He's a flamboyant, somewhat androgynous fashion designer.
"I shall dispose of you quickly, and then eat you for lunch!"A Wicked Witch who has long bedeviled the Beanbean Kingdom, Cackletta learned that only one with a beautiful voice could use the wish-granting artifact known as the Beanstar... so she and her eccentric henchman, Fawful, turned to the neighboring Mushroom Kingdom to steal the voice of its monarch, Princess Peach. Big mistake—the Mario Bros. were on the case in a heartbeat.Halfway through the game, Mario & Luigi confront Cackletta and successfully defeat her. She nearly dies from the fight, but Fawful saves her by absorbing her soul with his headgear. Shortly afterward, Fawful projects her soul into an unconscious Bowser's body, reviving her as Bowletta.
- Ambiguous Gender: When she possesses Bowser and becomes Bowletta, resulting in Pronoun Trouble.
- Badass Cape: She wears a black, spiky one which resembles a bat's wings.
- Badass Boast: When Mario and Luigi corner her in the Woohoo Hooniversity, she makes it clear that she's going to really let the Bros. have it:"Ha! Hmmph! Well, won't this be fun! Oh yes! If that's how it is, I'm ready for you! I'm going to knock you all the way back to the Mushroom Kingdom!"
- Bat out of Hell: Attacking one of her copies will cause it to turn into a swarm of bats and attack the bros.
- Big Bad: Of Superstar Saga.
- Boss Remix: Her first battle theme is a remix of her leitmotif crossed with the "panic" theme.
- Cognizant Limbs: Cackletta's ghost has four separate targets: her right hand, her left hand, her head, and her heart.
- Cool Chair: She uses a jet-propelled throne as her method of transportation, though once she becomes Bowletta, she ditches it in favor of using Bowser's vehicles instead.
- Death from Above: When Bowletta is low on health, they will start using an attack which causes star-shaped projectiles to rain down. The stars are Color-Coded for Your Convenience - the red ones are aimed at Mario, the green ones are aimed at Luigi, and the purple ones don't hit anyone and are just for show.
- Demonic Possession: Cackletta's body dies about halfway through the game, but her spirit possesses Bowser, creating the mind-scarring... thing... that is Bowletta.
- Disc One Final Boss: She manages to play this to herself — she's fought and defeated in her original body halfway through the game, which you're briefly led to believe is the end, but then she comes back as Bowletta...
- Doppleganger Attack: She can create duplicates of herself to confuse attackers.
- Evil Laugh: "Eeyah ha ha ha!"
- Final Boss: Of Superstar Saga, as Bowletta (and her spirit).
- Forgotten Fallen Friend: Isn't mentioned at all by Fawful in Partners in Time or Bowser's Inside Story.
- Heads I Win, Tails You Lose: After the bros. seemingly defeat Bowletta, a Time Bob-Omb walks on screen and instantly KOs them. Bowletta then swallows them whole, and the bros. are forced to fight Cackletta's ghost inside Bowser's body.
- HP to 1: Mario & Luigi's Hit Points are reduced to one before the final battle with her spirit.
- Killed Off for Real: Mario and Luigi first kill her body, then they exorcise her soul inside of Bowser. In a series where Death Is Cheap, she holds the dubious honor of being the first Mario villain to ever suffer such a fate.
- Master of Disguise: Her Lady Lima disguise is flawless despite Lady Lima being much smaller than she is.
- Meaningful Name: Cackletta.
- Nightmare Face: During her first encounter with the Mario Bros. in Woohoo Hooniversity.
- Ominous Pipe Organ: Features heavily in her rather somber Leitmotif, as well as the battle themes of both Bowletta and her ghost.
- One-Winged Angel: She has both Bowletta (Cackletta possesing Bowser) and her ghost form.
- Organic Bra: When she is Bowletta, she has two large plates on her chest.
- Our Ghosts Are Different: The final enemy Mario and Luigi face in Superstar Saga is Cackletta's ghost, possessing Bowser.
- Out-Gambitted: Quite possibly the only reason her plans failed was because Peach had been warned well ahead of time that she'd be after her voice for awakening the Beanstar, so she set up a decoy.
- Playing with Fire: She can throw magical fireballs. As Bowletta, she gains Bowser's fire abilities.
- Portable Hole: Can create this to make the Mario Bros. fall inside and take damage.
- Punny Name: In both English and Japanese; in the latter her name is "Geragemōna", "geragera" being an onomatopoeia for laughter. Her localized name refers to cackling, which she does in fact do (being a Wicked Witch and all).
- Regal Ruff: Wears one that resembles a flower's petals. Although she is not from a noble background, as far as we know, her fancy style of clothing symbolizes her aspirations of taking over a kingdom.
- Sequential Boss: The final battle has two phases. The first phase is the fight with Bowletta. For the second phase, she eats the Mario Bros., and they fight her spirit inside Bowser's belly.
- Shielded Core Boss: When fighting her ghost, her Cognizant Limbs need to be destroyed in order to expose her heart, which is the main target.
- Shock and Awe: Her main attack in the first battle is firing magical lightning bolts.
- Slasher Smile: As Bowletta, her default expression is a toothy, demonic grin.
- Summon Magic: Her spirit is capable of summoning an apparition that resembles Fawful, which will continuously attack the Mario Bros. until they hit it with their hammer.
- Take Over the World: Or at least two kingdoms. She was probably planning on expanding, eventually.
- Turns Red: When Bowletta is low on health, it will change its color palette to mostly black. In this state, Bowletta cannot be jumped on, and they get a new attack where they causes a bunch of stars to fall on the bros.
- Vacuum Mouth: Using Bowser's body, she does this to Mario and Luigi after the first phase of the final battle, then proceeds to tenderize them before her soul devours them whole.
- Walking Spoiler: Not so much Cackletta on her own as Bowletta, the form she takes midway through the game upon being killed and then possessing Bowser.
- Wicked Witch: Just look at her. She's even got the cackle down.
"I have fury!!!"A crazed inventor who constantly spouts strange similes and garbled English, he first appeared as Cackletta's right-hand man, aiding her in her schemes. He was seemingly killed near the end of Superstar Saga, but in fact survived, laying low in the sewers of Peach's Castle, running a badge shop while plotting his return to glory. He carried out these plans in Bowser's Inside Story, returning as the main antagonist, causing the Blorb outbreak, and taking control of both Bowser's and Peach's castles, as well as unearthing an ancient evil in order to use its power for his own ends. Of course, in taking Bowser's Castle, he angered the Koopa King; a mistake that ultimately led to his downfall.
- Advancing Boss of Doom: During the fight with the Dark Star Core, Fawful will shroud the area in darkness then chase Mario and Luigi while the Dark Star Core flings itself at Mario or Luigi.
- A God Am I: His ultimate goal in Bowser's Inside Story was to absorb the power of the Dark Star and take over the Mushroom Kingdom.
- Badass Bookworm: A skilled inventor, a competent schemer, and more than capable of handling himself in a fight if he has to (as long as he has his vacuum helmet).
- Bald of Evil: As the picture shows, he's completely bald save the little wisp of hair on his head.
- Benevolent Boss: He is kind and respectful to Midbus and gets complete loyalty in return.
- Beware the Silly Ones: He may be completely freaking nuts, but that doesn't mean he can't be dangerous.
- Big Bad: Ascended to this position in Bowser's Inside Story. He even foreshadowed it in Partners in Time.
- Bizarre Alien Biology: The final fight with him in Superstar Saga has him sporting an antenna on his head, making him look like a stereotypical alien.
- Brains: Evil; Brawn: Good: Especially in Bowser's Inside Story where he, the Gadgeteer Genius, serves as the Big Bad and Bowser, the Dumb Muscle, serves as the Villain Protagonist.
- Breakout Villain: Went from a right-hand man to the main villain of the first game, and a sewer hermit in the second, to become the third game's main antagonist himself.
- Casting a Shadow: After absorbing the Dark Star's energy.
- Catch Phrase: The above quote. In Bowser's Inside Story, he instead favors the variation "I have chortles!".
- Cheshire Cat Grin: His default expression. They can turn into unsettling Slasher Smiles near the end of the game. Especially as he tries to take out Mario and Luigi as he dies.
- The Chessmaster: Masterminded the plot of Bowser's Inside Story.
- Classic Villain: Representing Ambition, Pride and Wrath.
- Cloudcuckoolander: A rare, villainous example.
- Demoted to Extra: In Partners in Time, his role is reduced to being a shopkeeper. He does foreshadow his role as a Big Bad in Bowser's Inside Story though.
- Department of Redundancy Department:Fawful: But now it is the time for the final act in the finale's closing last encore!
- Disney Villain Death: Gets sent flying in Superstar Saga. The Mario Bros. should have made sure he was dead.
- Doomy Dooms of Doom: His iconic "The mustard of your doom" line in Superstar Saga.
- The Dragon: To Cackletta in Superstar Saga.
- Dragon Ascendant: He is the Big Bad of Bowser's Inside Story.
- Emergency Transformation: After being beaten by Bowser, Fawful transforms... into a small insectoid blob of dark energy.
- Eternally Pearly-White Teeth: That shit-eating grin of his remains gleamy white no matter what he goes through.
- Evil Tastes Good: He's quite fond of food-related metaphors, especially in Superstar Saga.Princess Peach's sweet voice will soon be the bread that makes the sandwich of Cackletta's desires! And this battle shall be the delicious mustard on that bread! The mustard of your doom!
- Final Boss: Of Bowser's Inside Story, as the Dark Star Core. He shares this duty with Dark Bowser, but in order to make Bowser able to defeat him, Mario and Luigi must defeat the Core first.
- For the Evulz: While Fawful does have a plan, very few of his projects involve it at all. The only apparent motive for 80% of his actions appear to be for sheer fun.
- Gadgeteer Genius: On top of his magic powers, he invents many quirky machines, such as the Peach-bots and Vacuum Helmet. He even turns Peach's Castle into a Humongous Mecha near the end of the game.
- Gambit Roulette: Fawful, predictably, slips into this territory. For instance, getting Toads infected with the Blorbs seems to have no other purpose than to draw Bowser out of his castle in concern for "his" kingdom and get beaten up by Mario, then smacked into the forest where he'd accept the mushroom from Fawful in desperation for a means to beat Mario. The Blorbs have the added effect of keeping everyone busy with the epidemic and off his tail, effectively making his work invisible until it was too late.
- Giggling Villain: "I HAVE CHORTLES!"
- Intentional Engrish for Funny: Fawful's most defining trait.
- I Shall Taunt You: Loves to excessively taunt and ridicule his enemies, almost to the point of trolling them. His constant target is Bowser, who he goes out of his way to enrage.
- It's All About Me: Showed shades of this in Superstar Saga. He had a literal camera crew during the cutscene before his final battle. Bowser's Inside Story took this trope Up to Eleven and beyond with him turning Bowser's castle into Fawful Theater, complete with statues and merchandise of him, a show about him that he would perform, and brainwashing Bowser's minions into treating him like a celebrity. And his speech at the end of Inside Story can be summed up as "it wasn't my fault. I did everything right! It was you Mario Bros. who ruined everything! And if I'm going down, I'm Taking You with Me!"
- Killed Off for Real: He dies at the end of Bowser's Inside Story and makes no appearance in Dream Team.
- Mad Libs Catch Phrase: "I have ____!" Most apparent in Bowser's Inside Story.
- Mad Scientist: He's a brilliant inventor despite being a complete nut.
- Make My Monster Grow: During the fight with Dark Bowser, Fawful can revive Dark Bowser when his health is depleted and double his normal size. And when he fights the Mario Bros., he grows to a towering insect monster.
- Malevolent Mugshot: Good God! The guy has statues of himself everywhere in Bowser and Peach's castle.
- Meaningful Name: His name is derived from the words "guffaw" and "awful". His Japanese name "Gerakobits", just like his boss's, comes from "geragera", an onomatopoeia for laughter.
- Narcissist: Bar none the most narssistic villain in the Mario series.
- New Powers as the Plot Demands: His Vacuum Helmet in Superstar Saga and his Ray Gun in Bowser's Inside Story, both of which do whatever the plot needs him to do.
- Nice Hat: His Vacuum Helmet in Superstar Saga and Bowser's Inside Story, which helps him fly and fight.
- Nice Job Fixing It, Villain: Giving Bowser the Vacuum Shroom would prove to be a fatal mistake, as Bowser eventually learns how to control it and turns it against him in the Final Battle.
- Noble Demon: In Bowser's Inside Story, when Bowser arrives just as they are attempting to break the seal on the Dark Star, Midbus prepares to fight him. Fawful is uneasy about it at first and decides to fight alongside him. But he then changes his mind out of respect for Midbus's pride and instead powers him up with his ray gun to give him an edge.
- No Cure for Evil: Averted. During his fight with Bowser, Fawful's Vacuum Helmet can periodically heal him unitl it's destroyed.
- Not-So-Harmless Villain: His defeat in Superstar Saga reduced him to a lowly shopkeeper with delusions of grandeur and plans for revenge. Bowser's Inside Story sees him carrying out those plans and his rise to the Big Bad of the game.
- One-Winged Angel: An accidental one. See Emergency Transformation for details.
- Opaque Lenses: With swirls on them. Fitting, given what a nutjob he is.
- Plucky Comic Relief
- Psychopathic Manchild: The "child" part really shines in his voice clips.Fawful: YAY!!!
- Ray Gun: Has one in Bowser's Inside Story, which can be used for a variety of purposes.
- Red and Black and Evil All Over: In Bowser's Inside Story, he wears a black jumpsuit with a red cape.
- Red Eyes, Take Warning: After absorbing the Dark Star's power, his glasses turn red.
- Red Oni, Blue Oni: Serves as the red to Cackletta's blue and conversely, the blue to Bowser and Midbus's red.
- Shock and Awe: His antenna in Superstar Saga can fire electric bolts.
- Slasher Smile: His default expression. It gets even wider as he's about to try and take down the Mario Bros. with him.
- Smug Snake: His biggest weakness. Fawful is by no means stupid, but he gives himself way too much credit.
- The Starscream: Subverted near the end of Superstar Saga, when he considers being his own boss for a change instead of merely a henchman. He ends up being defeated before he can pursue the issue any further, but ultimately gets his wish anyway.
- Squishy Wizard: He struggles to carry Princess Peach after removing her from Bowser's body.
- Supreme Chef: Even Bowser admits that Fawful's cooking is amazing.
- Taking You with Me: Tries to do this at the end of Bowser's Inside Story.
- Talks Like a Simile: Likes to liberally sprinkle his speech with similes. Really weird ones, too.
- That Makes Me Feel Angry: Most of his "I have ____!" quotes are this.
- Took a Level in Badass: In Bowser's Inside Story. Watching him go from The Dragon to Big Bad is a sight to behold.
- Verbal Tic:
- In the Japanese version, Gerakobits punctuated his sentences with "~Fururururu!". This was changed drastically in the localization. The French localization keeps the tic in the form of an Evil Laugh that goes "Fuyuyuyuyuyuyu!".
- In Superstar Saga, he has the tendency to call people "fink-rats." He only does it once in Bowser's Inside Story.
- Villain Song: Parodied.Fawful: Fawful sings a song of bad! Mushroom Kingdom is so sad! All of it for Fawful and the... rhyme... with that.
- Weak, but Skilled: In terms of physical prowess, Fawful is sorely lacking. Even carrying someone as dainty as Princess Peach is a huge burden for him, but he's a very skilled Gadgeteer Genius and a chessmaster with a gift for improvisation.
"I'll be taking that, see?"A criminal and self proclaimed 'Shadow Thief', from Beanbean who encountered the brothers several times. Has no ties to the main villains but becomes a nuisance with the help of his incredibly dangerous sidekicks.
- Badass Normal: Has no special abilities, but manages to pose a threat, with or without backup.
- Bash Brothers: The only bosses that have their own Bros. Attacks are himself and Bowser.
- Battle Couple: According to Birdo at least; Popple had his objections.
- The Bus Came Back: He returns in Mario & Luigi: Dream Team trying to rob the denizens of Pi'illo island.
- Butt Monkey: Doesn't get a piece of loot for his efforts, suffering even at the hands of his Rookies. Even his Bros. Moves always involve him getting harmed in some extraordinary fashion.
- Captain Oblivious: He makes enemies of two famous heroes and enlisted a king as a lackey, and still has no idea.
- Catch Phrase: "Boo, I say!"
- Combination Attack: With his "Bros. Moves". He also tends to be on the short end of them too.
- Cowardly Boss: In all of his Dual Boss battles, once his "rookie" is defeated, he's quick to turn tail and flee.
- Dragon-in-Chief: Inverted. He has a bad habit of hiring "rookies" that are way more dangerous than he is. Taken to its logical extreme when he makes the Mario Bros. themselves his rookies in Dream Team.
- Demoted to Extra: While he made a few major contributions to the plot in Superstar Saga, he has very little importance in Dream Team.
- Discard and Draw: In the Teehee Valley battle, he's a bit weaker than the last time the Mario Bros. fought him, but now has Birdo backing him up.
- Dirty Coward:
- Runs as soon as his partner falls, aside from a rare moment of Villainous Valour.
- In Dream Team, he attacks Mario and Luigi immediately after Wiggler is beaten just because he wants all of the treasure for himself.
- Dual Boss: Most of the battles with him are fought alongside whoever his current "rookie" is. The only exception is the third battle; he fights solo since, at the time, he didn't have a rookie.
- Even Evil Has Standards: Willing to move the Beanstar out of harm's way and bow to Mario before battle.
- Irony: After beating him for the final time in Superstar Saga, he can be seen working a job polishing mushrooms in Little Fungitown. His Toad boss calls him "Rookie."
- Jerkass: He was never nice, even to his own rookie.
- The Load: When he's "on your side" in Dream Team. He not only provokes a completely unnecessary boss fight with a friendly Wiggler, all his actions in the fight only make the Wiggler madder.
- Lone Wolf Boss: He isn't affiliated with the main antagonist of either of the two games that he appears in, he just wants to steal treasure.
- Never My Fault: Possibly the only person who has placed blame on Bowser and got away with it. Birdo didn't take it kindly.
- Recurring Boss: Fought four times in Superstar Saga.
- Thief Bag: Carries one. In battle he uses it to throw random stuff at Mario and Luigi.
- Took a Level in Jerkass: He was never kind to his rookies, but as of Dream Team he puts them in harm's way to save his skin, then betrays them when the opportunity strikes. Of course, since this time his "rookies" are the Mario Bros. themselves, it doesn't end well for him.
- Undying Loyalty: Inspires this from his Rookies, both become furious if he's attacked. One has to wonder why, though.
- Unwitting Instigator of Doom: Inadvertently set the second half of Superstar Saga into motion by trying to claim the Beanstar.
- Verbal Tic: Tends to punctuate his sentences by saying "see," see?
- Video Game Stealing: Capable of stealing the hammers out of the Bros.' hands.
- When All You Have Is a Hammer: His attacks are limited to tackling, stealing, and throwing loot. Dangerous enough against the Mario Bros., but completely useless against a Wiggler.
An odd creature who rules over the Stardust Fields, the border between the two kingdoms. After Bowser's Koopa Cruiser is brought down by Fawful, The Koopa King lands in one of Tolstar's cannons. He asks for a bribe in return for not telling anyone about the incident, but since the Mushroom Kingdom's currency exchange rate is low, the Bros. have to scour the Fields to scrounge up enough money.
- Arc Villain: Keeps Mario and Luigi from exiting Stardust Fields, indirectly causes Bowser's amnesia, and vouches for the Bros. to the Beanbean soldiers, then is not heard from for the rest of the game.
- Comical Angry Face: When angry, he puffs out his cheeks and his eyes go blank.
- Evil Laugh: "Nyeck nyeeck nyeeeeck!" Not only is he one of few characters to have a distinct laugh, it's also an attack indicator.
- Fat Bastard: He mocks Bowser for getting stuck in his cannon and refuses to help him out unless the Mario Bros. pay him 100 Beanbean coins. Even after the bros. do give him the coins, he double-crosses them and attacks them.
- Flight: He is somehow capable of this despite the fact that his wings look way too small to lift him.
- Heel–Face Turn: Of a sort. After being beaten by the Mario Bros., he shows up later to vouch for the Bros. to the Beanbean soldiers to help let them through, despite not appearing to have any motivation for this.
- Slasher Smile: gets a particularly good one whenever he laughs, complete with blank happy eyes.
- Spike Balls of Doom: His method of attack.
- Starter Villain: The first real threat that the Mario Bros. face in the game, and his defeat allows the Mario Bros. to properly get into the Beanbean Kingdom at last.
- Suspiciously Similar Substitute: He is heavily based on Spikes from Super Mario Bros. 3, given his appearance and his attacking method of throwing spiked balls.
- Warm-Up Boss: He's the first "real" boss of the game; more specifically, he's the first boss who isn't a tutorial boss, and the first one to have boss music.
A creature found in Joke's End. She harasses the Mario Bros. throughout the place, culminating in a battle with her and a friend of hers.
- An Ice Person: She can freeze the Bros, or unleash a blizzard in the middle of battle.
- Arc Villain: For Joke's End.
- Barrier Change Boss: Jojora's friend periodically changes hair colors, also changing her weakness - blonde for Firebrand and pink for Thunderhand. Hitting her with the wrong one heals her.
- Cowardly Boss: Counter her attack and she'll leave the battle for a few turns.
- Dual Boss: With her friend.
- Magic Wand: Her weapon. Knocking it away causes her to flee the battle temporarily in order to retrieve it.
- Psychopathic Manchild: She considers dragging the Mario Bros. through the inhospitable Joke's End and inviting her friend to pulverize them a game, and throws a tantrum upon losing.
- Skippable Boss: If you defeat her friend first, she'll throw a fit and leave.
- Stone Wall: Her defense is massive, to the point where pretty much any attack does Scratch Damage. She only has 50 Hit Points though, so Spam Attacks are very effective against her.
A living mechanical suitcase created by Professor E. Gadd to help Mario and Luigi on their quest and to hold all their items.
- Bag of Holding: He can hold an absurd amount of materials. Made most apparent with the Cobalt Star, which has a graphical field sprite even bigger than his despite it being stored within him for most of the game.
- Borrowed Catchphrase: At one point in Paper Jam Starlow uses his "BACK TO ADVENTURE!" phrase, complete with shouting it right as a cutscene ends and control is returned the player.
- Catch Phrase: "BACK TO ADVENTURE!"
- Exposition Fairy: Specifically designed as such by Professor Gadd.
- Neologism: His main speech quirk is a tendency to take at least two words, either of which would be appropriate for a certain context, and then combine them into some new word.
- Point of No Return: Subverted thanks to him. During the endgame, he warns you that it's the point of no return, but at any save point thereafter, he gives you the option of going back in time to before you passed the point, giving you the option to go and get better prepared.
- Sesquipedalian Loquaciousness: Prone to this. He'll even go as far as to make up words that sound complex but are merely extensions of simpler words.
- Waddling Head: Inasmuch as his body can be considered a "head."
A friendly, spunky Koopa Troopa who the Mario Bros. first meet as a reporter for the Koopa Kronicle covering the ongoing Shroob Invasion while also helping the plumbers in their fight against the invaders. She returns in Dream Team as a tourist guide writer who tasks the Bros. with retrieving pictures from the Camera Blocks she scattered across Pi'illo Island.
- Big Damn Heroes: At one point saves the Mario Bros. by disguising herself as a Shroob, and blasting a group of real ones with one of their own ray guns.
- The Bus Came Back: She returns in Dream Team after a seven-year absence.
- Intrepid Reporter: She cheerfully treks across the Mushroom Kingdom recording every possible scoop concerning the Alien Invasion.
- Killed to Uphold the Masquerade: She got turned into a Shroob mushroom by the Elder Shrooboid before she could reveal the true nature of the Cobalt Star.
- Older Than They Look: She doesn't appear to have aged a day between Partners in Time and Dream Team despite at least a 30 year time gap.
- Seen It All: Upon meeting her again in Dream Team, Mario and Luigi try to remind her of her helping them during the Shroob Invasion when she was a reporter, only for her to state that she's had too many jobs to remember that one in particular. That's right, her life has been so eventful that witnessing the near-destruction of the Mushroom Kingdom by alien invaders and getting turned into a mushroom were all comparatively unmemorable.
- Swallowed Whole: By Petey Piranha.
- Tagalong Reporter: She follows the Mario Bros. around knowing that they're Shroob magnets.
ToadikoA female Toad who accompanied Princess Peach and Toadbert in Professor Gadd's time machine. She was promptly captured by the Shroobs to have her vim extracted. She is found being drained by a tree in Toadwood Forest, where she tell the Mario Bros. about the Vim Factory before being turned into a Shroob Mushroom.
- Baleful Polymorph: Spends most of the game Shroobified.
- Chuck Cunningham Syndrome: Not seen in the sequel.
- Pink Girl, Blue Boy: The pink to Toadbert's blue.
- Sacrificial Lamb: Her character exists almost entirely to establish how evil the Shroobs are and how their actions will affect everyone if they are not defeated quickly. Even though she recovers later.
ToadbertA spectacled Toad who accompanied Princess Peach and Toadiko in Professor Gadd's time machine. He escapes the Shroobs but loses his memory. He is later found inside Yoob's gut on Yoshi's Island, where he shows the Mario Bros. a sketch of his he was able to draw before his amnesia. He reappears in Bowser's Inside Story as one of the Toads who got inhaled by Bowser.
- Amnesia Danger: His amnesia keeps him from telling the Mario Bros. of the important info about the sketch that has him so spooked. He gets Shroobified right after regaining his memories, only able to tell the Bros. to clean off the image but without being able to explain the full significance of it.
- Demoted to Extra: He's not nearly as important to the plot in Bowser's Inside Story as he was in Partners In Time.
- Killed to Uphold the Masquerade: He got Shroobified by the Elder Shrooboid before he could reveal the true nature of the Cobalt Star.
- Pink Girl, Blue Boy: The blue to Toadiko's pink.
- Verbal Tic: He certainly has one, by boogity!
Mr. and Mrs. ThwompA Thwomp couple who have traveled to Thwomp Volcano to witness its yearly eruption; when they find the Mario Bros. are more or less responsible for the volcano being quenched, Mrs. Thwomp gets mad and attacks them. Once she calms down, Mr. Thwomp helps them into Thwomp Caverns by acting as an elevator. While Mr. Thwomp looks just like a regular Thwomp, Mrs. Thwomp looks like a round boulder with arms.
- The Smurfette Principle: Mrs. Thwomp seems to be the only female Thwomp in existence.
Gramma Red and Gramma GreenTwo elderly Toad merchants who maintain an item shop in the middle of a Shroob-infested Toad Town.
- Recurring Element: Have the same "red elder, green junior" motif as the Mario Bros. and all the other sibling pairs in the series.
Star Shrine GateA sapient gate who keeps the unworthy out of the inner depths of the Star Shrine.
A militant race of mushroom-like aliens who abandoned their dead, barren planet in favor of greener pastures, laying their eyes on the Mushroom Kingdom of the past. When they attacked Peach's Castle while the adult Princess Peach happened to be visiting in E. Gadd's time machine, they took her prisoner, driving the Mario Bros. to travel back in time and team up with their younger selves in order to defeat the invaders.
- Alien Among Us: Apparently, some shroobs either managed to evade the Koopa Troop or escape from their confinement in Bowser's Castle. One appears in Fawful's Theater's audience in Bowser's Inside Story, and what appears to be an "alien sighting" picture appears in Dream Team.
- Alien Invasion: They successfully invade and conquer the Mushroom Kingdom of the past.
- Aliens Are Bastards: They take great joy in commiting numerous acts of dickery over the course of the game.
- Aliens Speaking English: Averted, except in the case of Elder Princess Shroob, who can speak normally (but in ALL CAPS).
- Always Chaotic Evil: There is not a single Shroob in the entire game that isn't evil.
- Arc Words: The Shroobs speak a certain phrase constantly. You eventually find out it means "DESTROY!"
- Badass Moustache: Shroobsworth.
- Bonus Boss: Bowser's Inside Story has a hidden boss fight against three Shroobs in Bowser's Castle. Defeating them rewards the Mario Bros. with a powerful special attack, Magic Window.
- Cyborg: RC Shroobers.
- Deadly Doctor: Doctor Shroobs.
- Dying Race: Their planet was apparently on its last leg.
- Everything's Better with Spinning: They and their sub-species have a habit of doing this.
- Evil Counterpart:
- The species in general to the Toads, and Princess Shroob and Shroobsworth to Peach and Toadsworth (though Shroobsworth is a regular enemy rather than a plot-centric character).
- Shroobsworth also counts as one for the Marios, as his fighting style involves combo attacks using a baby Shroob.
- Fast Tunnelling: Done by Shrooba Divers.
- Flying Saucer: Tons of them.
- The Goomba: Shrooblets.
- Great Offscreen War: Implied to have had one with the Koopa-Troop in the interim between Partners In Time and Bowser's Inside Story. They lost.
- Hopeless Boss Fight: Adult Mario and Luigi vs. three Shroobs near the beginning of the game. The Shroobs are aided by a giant bomb-carrying UFO that destroys the brothers after three turns, making the fight impossible to win. The babies pay them back later.
- Human Popsicle: In Bowser's Inside Story, numerous Shroobs can be found frozen in Bowser's basement.
- Killed to Uphold the Masquerade: The Shroobs have a chronic habit of Shroobifying anyone who tries to reveal the secret of the Cobalt Star.
- Knight of Cerebus: Doesn't even begin to describe how terrifying these monsters are...
- Man on Fire: Blazing Shroobs.
- Mecha-Mooks: Shroids.
- Omnicidal Maniac: DESTROY!
- Ray Gun: Their main weapon.
- Rock Beats Laser: The Life-Sucking mushrooms they plant around the Mushroom Kingdom can be disabled by crying on them.
- Take Over the World: And by the time the Mario Bros. arrive, they've already succeeded.
- Technopath: RC Shroobers.
- Underground Monkey: Various "Shroobified" enemies.
- Vile Villain, Saccharine Show: They are responsible for some very nasty acts.
- Wingdinglish: Their language.
- What Happened to the Mouse?: Yoob and Junior Shrooboid seem to have been forgotten.
"I am Princess Shroob. You interlopers... will be consumed."The main antagonist of Partners In Time. She led the Shroob invasion of Mushroom Kingdom in a bid to find a new home for her race as theirs was in danger or dying. When Princess Peach traveled in time to visit the Mushroom Kingodom, Princess Shroob captured her in a bid to take over the Mushroom Kingdom of the present, an act that unfortunately put her in the crosshairs of the Mario Bros.
- A Glass of Chianti: As the picture shows, she is occasionally seen drinking a strange beverage.
- Aliens Speaking English: Averted. Like the rest of the Shroobs, she speaks their language. Though at later points of the game, her speech is translated via parenthesis.
- Authority Equals Asskicking: She's the Princess of the Shroobs, and as such one of their most dangerous members.
- Ax-Crazy: Next to Dimentio, she's possibly the most psychopathic villain in the Mario series.
- Big Bad: The leader of the Shroobs, and thus, the main antagonist. Her older sister, the actual leader, was sealed inside the Cobalt Star by Peach, so she takes over until her death.
- The Chessmaster: Princess Shroob is very thorough with her plans for conquest. She anticipates the bros. movements and plans ahead for countermeasures like how they would try to rescue Princess Peach in Gritzy Caves while she was disguised as her to conquer the kingdom in the present and how if all else failed to terminate the brothers and she would get defeated, made sure the front gate of Shroob Castle would only open with the other five Cobalt Star shards imprisoning her sister.
- Dragon Ascendant: Takes over the invasion of the Mushroom Kingdom after her sister is sealed in the Cobalt Star.
- Energy Ball: Most of her attacks involve throwing these at the Bros.
- Evil Counterpart: She is to the Shroobs what Peach is to the Toads.
- Frickin' Laser Beams: Her throne is equipped with these.
- For the Evulz: Desperation to find a new home for your Dying Race is one thing, but she also commits and directs various actions that seem motivated by pure sadism.
- Giggling Villain: Lets out a pretty creepy giggle when things go her way.
- God Save Us from the Queen!: Although she is referred to as a princess, the principle's still the same.
- Hair-Trigger Temper: Princess Shroob has a bit of a short fuse and gets mad when things don't go her way. And when the gang shoots down her mothership and destroys the tower made in her image, she completely loses it.
- The Heavy: Though her sister is the true leader of the Shroobs, Peach's intervention meant that she was the one to spearhead the invasion effort.
- Knight of Cerebus: She lacks comedic traits and not only manages to take over the Mushroom Kingdom of the past, but very nearly does the same to that of the present.
- Lack of Empathy: Feels no remorse for any of the things she's done, and doesn't seem to have any love for her sister as she made no attempt to free her from the Cobalt Star, nor showed any indication that she intended to.
- Malevolent Mugshot: There are statues of her in Shroob Castle.
- Mask of Sanity: At first glance, one has the impression of a calm, controlled ruler. But hidden just below the surface is a sadistic, psychopathic monster that's waiting to be released. And once Mario and co. shoot down her mothership, the mask comes off.
- Princesses Prefer Pink: Princess Shroob wears a pink dress almost exactly like Peach's.
- Royals Who Actually Do Something: She actually leads the invasion on Mushroom Kingdom, and even disguises herself as Peach to invade the present Mushroom Kingdom.
- Shielded Core Boss: In the battle with her, she is protected by a shield that needs to be destroyed before she can be attacked.
- The Sociopath: Manipulative, impatient, and very sadistic, she has zero empathy for anything or -one but herself (even her sister) and doesn't care who she hurts as long as she gets her way.
- Teleport Spam: Does a lot of this during her boss fight.
- Tripod Terror: Her throne.
- Trojan Horse: She disguised herself as Peach with a Shroob mushroom stuck on her face in order to infiltrate the Mushroom Kingdom of the present. Had Bowser not kidnapped her, this plan would have succeeded.
- Turns Red: When down to half health, Princess Shroob will glow red and her attacks become faster and more dangerous.
- The Usurper: She didn't even try to recover the shards of the Cobalt Star to release her sister from imprisonment but did hold one at the factory. It's not crazy to believe she wanted to rule the kingdom without her sister around and found the opportunity to do it when Peach did the move.
- Vile Villain, Saccharine Show: It's quite jarring to encounter a villain as psychopathic as her in a Mario and Luigi game.
- Villainous Breakdown: When the Mario Bros. destroy her Mothership so it destroys the tower in Shroob Castle made in her image, she emerges from the wreckage furiously declaring that Peach is useless, the kingdom is hers, and she'll destroy everyone."NOW YOU'VE DONE IT! YOU'RE USELESS NOW, PEACH! TIME TO FINISH YOU! YOU CANNOT ESCAPE! THIS KINGDOM IS MINE! I WILL DESTROY YOU ALL!! DESTROY!!!"
YoobA Shroob-created monster resembling a Yoshi, it is found going around eating Yoshis on Yoshi's Island.
- Attack of the 50-Foot Whatever: It starts off pretty big, then gets really big once the Shroobs power it up.
- Evil Counterpart: Of Yoshi.
- Make My Monster Grow: It was already large, but eventually the Shroobs zap it with a laser to make it much larger.
- Overly Long Tongue: Being the Shroob version of a Yoshi, it's only natural that it would have one of these.
- Portmanteau: Of "Yoshi" and "Shroob".
- Swallowed Whole: Does this to the Yoshis, Baby Bowser, and both pairs of Mario Bros.
- The Unfought: Yoob itself is never actually fought at any point. A fight with giant-sized Yoob wouldn't have worked out since giant battles hadn't been introduced yet, but you don't even fight it when it's normal size. Instead, the bros. get eaten, explore its insides, stop the production of its eggs (which are its fuel) by defeating Sunnycide, and it simply ceases functioning, never to reawaken.
- Womb Level: The Mario Bros. have to traverse its innards to rescue the Yoshis and find the Cobalt Star shard.
Elder Princess Shroob
"I LAUGH AT YOU. MUSHROOM HEADS. PATHETIC THINGS. YOU GATHERED THE COBALT STAR SHARDS WITHOUT EVER GUESSING THE TRUTH! NOW I AM FREE! AND THAT HORRIBLE, HORRIBLE COBALT STAR IS NO MORE!"The actual leader of the Shroobs and the sister of Princess Shroob. She and her sister led the Shroob invasion in a bid to find a new home for her race. During which they encountered Princess Peach, who traveled to the past. Peach managed to seal her in the Cobalt Star before being captured herself.
- Aliens Speaking English: She's the only member of the Shroobs who speaks English, though it is IN ALL CAPS.
- Authority Equals Asskicking: The supreme leader of the Shroobs, and the game's most powerful foe.
- Ax-Crazy: Even more so than her sister.
- Bad Boss: Elder Princess Shroob has no problem shooting or knocking down her minions' UFOs.
- Cognizant Limbs: In her second form, her leg tentacles, arm tentacles, body, and crown are all separate targets.
- Combat Tentacles: Used by her final form.
- Even Evil Has Loved Ones: Despite being an even bigger monster than Princess Shroob, Elder Princess Shroob indicates that she thinks positively of her, complimenting her late sister and declaring that she will avenge her right before the battle.
- Foreshadowing: Kylie Koopa and Baby Luigi were able to sense something was wrong with the Cobalt Star.
- Final Boss: Of Partners In Time. While there's one more battle after this one, it's rather short and simple on top of being more of a minigame than an actual battle, whereas the Elder Princess Shroob is the last major challenge in the game, thus making her this.
- God Save Us from the Queen!: Although she is referred to as a princess, the principle's still the same.
- High-Altitude Battle: She is fought atop a flying platform in the sky above Shroob Castle.
- Hypocritical Humor: Refers to Toads as "STUPID MUSHROOM HEADS".
- Knight of Cerebus: She does not play or joke around once she takes center stage.
- Lack of Empathy: Just like her sister. She'll casually smack her own people aside as soon as they've done her will.
- Large and in Charge: Even before turning into a humongous tentacled monstrosity, she has a very heavy, muscular-looking build compared to her relatively dainty sister.
- Manipulative Bitch: Masquerades as the benevolent spirit of the Cobalt Star to trick the Bros. into freeing her. Peach told them the real story but she still managed to be released thanks to Baby Bowser.
- No Indoor Voice: Considering her text is in ALL CAPS, it's not hard to imagine that everything she says is shouted.
- One-Winged Angel: For her second phase, she transforms into a giant, tentacled monster.
- Princesses Prefer Pink: Just like her sister, she wears a pink dress.
- Roar Before Beating: She roars after going One-Winged Angel.
- Sad Battle Music: Her second form's battle theme, unlike the rest of the series' Final Boss music, is slow and somber.
- Sealed Evil in a Can: Princess Peach had her sealed away in the Cobalt Star. As seen in Bowser's Inside Story, her remains were frozen and locked away by Bowser along with the other Shroobs.
- Sequential Boss: Two phases.
- Sealed Evil in a Six Pack: Sealed away by Peach in the Cobalt Star which is then broken into six pieces.
- Shielded Core Boss: All attacks directed at her body (which is the main target) will do 1 damage until her crown is destroyed. On top of that, her crown cannot be targeted until her leg tentacles are destroyed. Both of these will regenerate after a few turns.
- Stronger Sibling: Much stronger than Princess Shroob- she doesn't even need a machine to fight!
- Time Master: Can rip open Time Holes.
- Transformation Trinket: Her crown, which she activates in order to go One-Winged Angel. It's also a Cognizant Limb which prevents the transformed princess from taking anything more than Scratch Damage from any given attack until its taken out.
- Unexplained Recovery: It's never explained how she got out of Bowser's stomach in Bowser's Inside Story.
- Walking Spoiler: Her very existence is a plot twist.
A little yellow ball of a creature who is sent to assist Princess Peach and the Mario Bros. as a representative of the Star Sprites, the beings who watch over the Mushroom Kingdom. In Dream Team, she is also sent to represent the Star Sprites on Pi'illo Island, though how exactly is never specified. Whenever Mario heads into the Dream World, she stays behind to do things to Luigi like pull his mustache and tickle his nose in order to alter things in the dream. While she is openly annoyed by Luigi's cowardice, she gradually warms up to him as she sees more examples of his heroism.
- Blank White Eyes: When shocked by something.
- Borrowed Catchphrase: Uses Stuffwell's "BACK TO ADVENTURE!" phrase at one point in Paper Jam.
- Comically Missing the Point: When one Pi'illo makes mention of her being nude, she angrily replies "OPEN YOUR EYES! I have SHOES!"
- Exposition Fairy: To the Mario Bros. and Bowser.
- Hidden Depths: Knows powerful magic involving the use of Pure Energy. Hinted at within several games and outright proven in Mario & Luigi: Paper Jam when she decides to use her abilities offensively and used "Supernova Sparkle" onto Ludwig and Larry (and accidentally the Mario bros) in an Offscreen Moment of Awesome.
- Interspecies Friendship: Is good friends with Peach, Mario and Luigi.
- Jerk with a Heart of Gold: This element of her personality is most apparent in her dealings with Luigi. In Dream Team, she initially expresses frustration with his Heavy Sleeper habits (partly out of jealousy that he can sleep so easily, and partly because him falling asleep on Dreambert led to Peach getting kidnapped in the first place). However, she shows concern for him later on when he is forced to sleep on the frigid summit of Mount Pajamaja, lighting the nearby furnace to keep him warm and demonstrating that she does ultimately care for his well-being.
- Little Miss Snarker: She's rather sassy with various characters, especially Luigi and Bowser.
- Meaningful Name: Starlow is a portmanteau of "star" and "yellow". Her Japanese name is literally "Yellow Star".
- Never Say "Die": "YOU GOT A KO WISH?!"
- Pure Energy: With Peach, she is able to use an ability called 'Wish Power' which, in Bowser's Inside Story, helps weaken Bowser in the tutorial fight and in Dream Team, stops Bowser from obliterating the Mario Bros. with the Dream Stone. She also uses an attack called "Supernova Sparkle" in Paper Jam when the team get blocked by Ludwig and Larry on their way to Bowser's Castle. It shouldn't be used in enclosed spaces though, considering how the bros. come out of the Warp Pipe rather dazed.
- Same Face, Different Name: She adopts the name "Chippy" for her dealings with Bowser in Bowser's Inside Story.
- Tertiary Sexual Characteristics: She is only visually distinguishable as female thanks to the long eyelash marks on her beady eyes. However, these eyelashes aren't visible on her in-game sprite and dialogue references to her as female are surprisingly few in number. During Dream Team, you can see the eyelashes when she's Luigi-sitting.
- Took a Level in Kindness: In Bowser's Inside Story, she is really quite blunt, almost to the point of rudeness, and insulting towards Luigi, questioning his abilities as a hero. In Dream Team, she has warmed up considerably towards him even though she still gets frustrated with him at times and in Paper Jam, Starlow is very much amiable towards Luigi even giving him a pep talk at one point.
- Voice for the Voiceless: Acts as this for Mario & Luigi and has, at this point, adopted herself as their official guide.
- Waddling Head: Well, the "waddling" part is absent, considering that she spends the whole time flying around, but she still fits the "round object with feet" part of the trope.
A member of the Brock race, who resemble the Blocks frequently seen in the Mario games, Broque is a block collector who has set up a shop in the Mushroom Kingdom where Bowser can buy stuff. In contrast to most other good characters in the Super Mario Bros. franchise, he is not friendly to the Mario Bros., as he disapproves of their block-hitting escapades. He returns in Dream Team as the head of Pi'illo Island's tourism business, where he is slightly more amicable toward the plumbers. In public at least.
- Badass Mustache: Has two which can double as eyebrows thanks to his odd detachable head.
- Big Ol' Eyebrows: His mustache becomes this when he flips his head over.
- French Jerk: Subverted; he's generally a Nice Guy and is only callous towards the Mario Bros.
- Gratuitous English: In the Japanese version ("Oh my dog! What's happen!").
- Gratuitous French: In the English version.
- Losing Your Head: He takes it off◊ in order to go from one expression to another.
- Punny Name: His name is combination of "block" and "croque-monsieur." Other translations make his name some sort of block pun, such as the European Spanish version naming him Charles Bloquette after Charles Martinet.
- Right Behind Me: In Dream Team, you can walk in on him ranting about the Mario Bros. to his coworkers because he doesn't like the fact how they keep bashing blocks and devaluing them.
- Training Boss: He willingly lets Bowser wail on him and suck him up to teach him the Vacuum Block mechanics.
Broque Monsieur's rather ferocious dog.
- Angry Guard Dog: He is Bowser's final special attack in Bowser's Inside Story. He also acts this way towards the Mario Bros.
- Demoted to Extra: In Bowser's Inside Story, he's a Training Boss, the cashier of Bowser's gear shop, and Bowser's final special attack. In Dream Team, he appears briefly to invite the Mushroom Kingdomites to Pi'illo Island before disappearing entirely.
- Infinity+1 Sword: Bowser gets him as a special attack if he delivers all of the Blitties to Broque Monsieur's shop.
- Perpetual Frowner: He never smiles and growls at anything that gets near him.
- Robot Dog: Implied by him having a communication screen on his back, assuming that wasn't also part of Luigi's dream.
- Training Boss: Broque tells Bowser how to use his fire breath on Broggy to subdue him.
- What Happened to the Mouse?: In Dream Team, you'll never see him again after the intro, though Kylie still managed to get a picture of him.
The Elite Trio (Private Goomp, Corporal Paraplonk, and Sergeant Guy)
A Goomba, a Paratroopa, and a Shy Guy who escaped Fawful's brainwashing of the Koopa Troop. They return in Dream Team having been promoted and carrying out Bowser's orders almost as much as Kamek.
- The Artifact: Goomp's pajamas, Paraplonk's Bucket Helmet and Sergeant Guy's backpack of whatever the heck he could grab before fleeing were originally used to indicate that they had been caught off guard by Fawful's takeover, yet they're still wearing those items (now decorated with Bowser's insignia) in Dream Team, where they would've had plenty of time to scrounge together something more practical.
- BFG: Sergeant Guy mans a pretty big Bullet Bill cannon in the boss battle with the Elite Trio in Dream Team. This was also what they (and Bowser) tried to use in order to launch an attack against Bowser's Castle in Bowser's Inside Story.
- Brainwashed and Crazy: Averted; they join Fawful of their own will.
- Bucket Helmet: Corporal Paraplonk.
- Climax Boss: In Dream Team, where they're fought in Dreamy Driftwood Shore after revealing that the real Peach was kindapped all along.
- Deadly Dodging: True of all enemies, but their giant Bob-Omb attack deserves special mention since it is easy to dodge and deals massive damage even to themselves. It is quite probable players will win the battle simply by letting them KO themselves with that move.
- Doppelgänger Attack: Sergeant Guy can use his magic rod to transform the Goombas under Private Goomp into identical copies of himself, who will run around in an attempt to confuse Mario and get some hits in. It's stopped at the end, or if you manage to hit the real Sergeant Guy.
- Easily Forgiven: Bowser allows them back into the army assuming that they pull their weight in defeating Mario.
- Et Tu, Brute?: They betray Bowser in Bowser's Inside Story, and the ending confirms that they did it willingly.
- Exposition Fairy: Corporal Paraplonk acts as this during the first Giant Bowser Battle.
- Heel–Face Revolving Door: They start out on Bowser's side, defect to Fawful willingly, then defect back, only to collectively try to become The Starscream in Dream Team, then give up that idea after the Mario Bros. deal them a sound thrashing.
- The Medic: Corporal Paraplonk, who regularly heals his comrades with mushrooms during the battle with them.
- Mighty Glacier: In Dream Team, Sergeant Guy has the most HP and POW, but is the slowest of the bunch.
- Pajama-Clad Hero: Seems to be the case with Private Goomp, who is always seen with blue pajamas and nightcap.
- Puzzle Boss: You have to defeat all three at the same time to win the boss battle.
- Rank Up: They all are promoted to Elite rank in the army as of Dream Team. This doesn't last too long once they're trounced by Mario and Luigi. Hell, they even ditch their "Elite" equipment for their less-surprising equipment when you see them again.
- Shout-Out: Their ranks and coloration are the same as three chraracters in Sgt. Frog (respectively Tamama, Giroro and Keroro).
- The Starscream: Believe they can be promoted to above Bowser if they win against Mario in Dream Team. Of course, it's Played for Laughs.
- Took a Level in Badass: In Dream Team, they're promoted to elites and they fight the Mario Bros.
- Wolfpack Boss: Combined with Flunky Boss in Dream Team.
Princess LipidA strange being who claims to control Bowser's mucus membranes.
- Honest Axe: She asks Mario if it was Luigi or "a treasure of e'erlasting wonder" that he dropped in the mucus. When Mario chooses his brother, she gives the the treasure anyway — the Good Badge and Mushroom Badge, plus a Tenderling enemy to try them out on.
- The Royal We: Refers to herself in the plural which, combined with her title and slightly antiquated speech, is clearly meant to evoke this trope.
Durmite/WisdurmA caterpillar creature resembling both Wiggler and Birdo that causes Bowser extreme pain after he accidentally swallowed it while eating the Giga Carrot, forcing Mario and Luigi to attack it. Later revealed to be Wisdurm, one of the Star Sages holding a Star Cure.
- Chekhov's Gunman: No one would have guessed she was a Star Sage during her first appearance.
- Heart Beat-Down: She can conjure a heart shaped stone during her second fight. The image on it signifies which of the Bros it's goting to hit.
- Interface Screw: During her star attack in the second fight, she can switch Mario and Luigi's positions to confuse the player.
- Magic Wand: Uses one during her second fight with the Mario Bros.
- Sizeshifter: She can change size at will. And one of her attacks is to shrink one of the Bros and trample them.
- Verbal Tic: Wisdurm has a tendency to slurrrr certain worrrrds.
- What Happened to the Mouse?: After giving the Mario Bros. the Star Cure, Wisdurm disappears and isn't even shown exiting Bowser's body at the end.
A Toad doctor who tries to find the cure to the mysterious disease plaguing the Mushroom Kingdom.
- Big "YES!": He has this as a voice clip.
- Bunny-Ears Lawyer: He has some awfully bizarre habits for such a renowned doctor.
- Crystal Ball: He has one that can see where the Star Cures are located, though the vision of Bowser turned out to just be Bowser himself reflected in the glass.
- Eccentric Mentor: Is he the one to guide you in your quest? YES!
- Insistent Terminology: He insists that the Miracle Cure be called the Miracle Toadley Cure.
- Verbal Tic: Does he like to speak in the form of questions and answers? He does.
Broque MadameA lovelorn female Brock with some very bad back problems. She and Broque Monsieur once dated.
- Ascended Extra: In Bowser's Inside Story, her only purpose is to give an optional sidequest for Bowser. In Dream Team, she helps hide Peach from the Big Bad Duumvirate and also owns a very posh shop.
- Attack of the 50-Foot Whatever: She becomes really big in Luigi's Luiginary Attack dream challenges.
- Big Beautiful Woman
- Me's a Crowd: Each Luiginary Attack challenge consists of you plowing through numerous dream copies of her.
- Verbal Tic: "Hee..."
KuzzleAn elderly Koopa Troopa who lives on Plack Beach, he once held one of the Star Cures before Bowser stole it and all of his furniture after getting frustrated trying to figure out one of his signature jigsaw puzzles.
- Punny Name: Most translations make his name some sort of pun on "puzzle."
An octopoid ascetic meditating on top of a mountain near Plack Beach, he is first introduced as the creator of the Chakroads that Bowser can use to teleport across the Mushroom Kingdom. Later, he is revealed to hold one of the Star Cures, which he agrees to give to Mario and Luigi if they can somehow break him out of the meditative pose he has held constantly for 1,000 years.
- Catch Phrase: "You are unenlightened."
- Chekhov's Gunman: Bowser first speaks with him in the first hour of the game. The Mario Bros. first see him near the end of the pre-final dungeon Fetch Quest.
- Enlightenment Superpowers: His meditation allows him to access the Chakroads, and also gives him Super Toughness.
- Everything's Squishier with Cephalopods
- Meaningful Name: His name, Chakroads and talk of mediation and enlightenment refer to "chakras", a type of Life Energy.
- Nigh Invulnerable: He quite simply cannot be damaged; he has 999 DEFnote and winning the "battle" just requires using a specific Special Attack.
FawfulSee Superstar Saga antagonists
"Now it is time! Now we will fight! Then you will lose! And you will cry!"With Fawful's ascension to primary villain, it's only natural that he'd get a lackey of his very own. This porcine brute may be a rather dim bulb, but his strength rivals even that of the King of Koopas himself. He antagonizes Bowser throughout the game on his master's orders, until he is at last defeated for good in the final stages.
- An Ice Person: Blizzard Midbus.
- Arrogant Kung-Fu Guy: His manner of speaking and sense of pride and honor nail him as this.
- Big Eater: As much as Bowser.
- Balloon Belly: In his second fight, he does this before unleashing a strong punch.
- The Brute: He's the brawn to Fawful's brains. With the latter being too weak to even carry Peach around without struggling, Midbus provides the raw strength he needs.
- Cloudcuckoolander: "Sense is for the weak."
- The Dragon: To Fawful.
- Dumb Muscle: He makes Bowser look like a genius. Even Bowser finds him an oddball.
- Epic Flail: A wrecking ball.
- Evil Laugh: "Muh muh muh!"
- Evil Counterpart: Eviler counterpart, perhaps, but he shares numerous characteristics with Bowser.
- Foil: Presumably to Bowser. Unlike Bowser, who's king and leader of a Badass Army of minions, Midbus is merely a minion of Fawful. Both are physically imposing Mix-and-Match Critters, but Bowser leans more on the reptile side aesthetically, while Midbus looks more like a warmblooded animal. Finally, Bowser can breathe fire, while Midbus gains ice powers in his final battle.
- Flunky Boss: He can send out Snawfuls once he becomes Blizzard Midbus.
- Full-Boar Action: He's a giant, villainous, slightly reptilian pig-monster.
- Hopeless Boss Fight: The battle against him in Cavi Cape.
- Intentional Engrish for Funny: Fawful has seemingly passed on his manner of speaking to him. Though in comparison to Fawful, his is not that bad. It sounds more like those badly translated kung-fu movies.
- Large Ham: Quite literally, too.
- Laughably Evil: Very much so.
- Meaningful Name: Midbus is a Mid-Boss.
- Mix-and-Match Critters: Like some kind of boar armadillo.
- Noble Demon: Has shades of this. During his fight with Bowser in Cavi Cape, he calls off the match when it appears Bowser is weakened by the Vacuum Shroom. He goes as far as to criticize Bowser for fighting him while giant, and being roasted doesn't change his attitude.
- No Cure for Evil: Aversion; in the cage match, he can heal himself by eating food tossed by audience members, if Bowser doesn't get to it first. His Snawfuls will also heal and power him up if they're left alone in his final battle.
- One-Winged Angel: Blizzard Midbus.
- Pig Man: A bit more animalistic and reptilian than the trope standard, but he still fits.
- Power Incontinence: After Blizzard Midbus is defeated, he loses control of his powers, and becomes frozen in a block of ice.
- Punny Name: Mid-boss.
- Real Men Wear Pink: Has pink skin.
- Recurring Boss: For Bowser.
- Shockwave Stomp: Shockwave Body Slam, technically. Bowser can counteract it by punching Midbus away before he lands.
- That Makes Me Feel Angry: "He is very round. I am amused."
- The Unfought: For the Mario Bros., who only encounter him once at the very end of the game and end up fighting a robot instead.
- What Happened to the Mouse?: His fate following being frozen in a block of ice is unknown.
"Soon this kingdom will vanish along with all who dwell within. And you, too, will sleep eternally in the dark power's embrace!"A being of pure evil that terrorized the Mushroom Kingdom in the distant past, but was eventually sealed away. Fawful unearthed it and attempted to drain its power, but the dark entity proved too powerful for him to handle; it consumed him and, after copying Bowser's DNA, transformed into a shadowy double known as Dark Bowser.
- Beam-O-War: Against Bowser before the Final Battle, though it's more like a Flame-O-War.
- Break the Haughty: Bowser kicking its ass does this to him. He is completely stunned that someone like Bowser would be able to stop it with the dark power completed.
- Casting a Shadow: It can animate and control shadows.
- Dark Is Evil: Right in the name. The Dark Star is a being of darkness with power over shadows, and absolutely evil.
- Diabolus ex Nihilo: Even in-universe, nobody has any idea where this thing came from or what the heck it even is.
- Eldritch Abomination: No one knows where it came from or what it is other than it's just pure evil. It can turn into a copy of others by entering their body and eating their DNA. And it's evil is so oppressive that Mario and Luigi nearly choke to death just by being in its presence.
- Evil Counterpart: Serves as one to Bowser for obvious reasons. He is also one for the Starmen and various other Star entities that appear throughout the whole Super Mario Bros. universe.
- Evil Is Not a Toy: Subverted. The Dark Star overpowers Fawful to regain the energy he had absorbed from it, consuming Fawful along with it. However, the two seem to form a mutually beneficial, if not truly symbiotic, relationship, with Fawful powering up Dark Bowser from within during its fight with the real Bowser, and the Dark Star's core lending its energy and assistance to Fawful in his own battle against Mario and Luigi.
- Evil Versus Oblivion: Represents oblivion to Bowser's evil.
- Final Boss: Dark Bowser is this for Bowser, while the Dark Star Core (actually Fawful) is this for Mario & Luigi.
- Flunky Boss: In its first battle, it spawns bug-like enemies called Dark Satellmites to aid it.
- For the Evulz: Possibly its only discernable motive for wanting to destroy the Mushroom Kingdom.
- Frickin' Laser Beams: It uses dark laser attacks as both its original form and the core of Dark Bowser and its strongest attack blurs the line between this and Wave Motion Gun.
- Generic Doomsday Villain: A rare dead-serious example. It desires nothing less than the total obliteration of everything in existence.
- Knight of Cerebus: For most of Bowser's Inside Story, you get plenty of laughs from the eccentricity of Fawful and Midbus, along with Bowser's attempts to communicate with his brainwashed Koopa Troop. Then comes this thing, which is devoid of any humor and plans on destroying everything in its path.
- Leitmotif: Has a pretty omninous tune that plays whenever it appears. It certainly helps cement its Knight of Cerebus status.
- Made of Evil: All forms. Apparently, a form of evil which can clone people's DNA.
- Mirror Boss: After absorbing Bowser's DNA, it becomes a dark copy of him.
- Obviously Evil: They don't call it the Dark Star for nothing.
- Omnicidal Maniac: It wants to destroy Mushroom World, if not the entire universe.
- Red Eyes, Take Warning: In all of its forms.
- Sealed Evil in a Can: It was sealed under Toad Town by the Star Sprites, but Fawful opened the can.
- Shielded Core Boss: Taken to an extreme in the final battle. First Bowser must deplete Dark Bowser's 1000 HPnote , after which Dark Fawful will fully heal and enlarge him. Then Bowser must punch Dark Fawful out of Dark Bowser's belly and then inhale him. Then Mario & Luigi must destroy Dark Fawful's Cognizant Limbs in order to expose the true weak point, the Dark Star Core.
- Tactical Suicide Boss:
- The Dark Star would be nearly impossible to defeat if it didn't keep spawning Dark Satellmites to aid it in battle.
- In the final battle, if Dark Bowser didn't grow larger whenever Fawful revives him, Bowser wouldn't be able to target his belly, which causes him to spit out Fawful for Bowser to inhale and the Mario Bros. to defeat.
- Taking You with Me: When Mario & Luigi deplete its HP in the Airway battle, you have to button mash to escape its kamikaze vacuum attack until it croaks.
- Technicolor Fire: Breathes out blue flames as Dark Bowser.
- Too Spicy for Yog Sothoth: Subverted. It has visible discomfort while copying Bowser's DNA at first, but it eventually adjusts. Starlow even lampshades it.Starlow: Only Bowser's body could give even the Dark Star indigestion.
- Vile Villain, Saccharine Show: You would think a game as hilarious as this wouldn't have such a monstorous Eldritch Abomination. But the Dark Star... begs to differ.
- The Voiceless: In its base form. It gains the ability to talk upon turning into Dark Bowser.
The prince of the Pi'illos, he was Taken for Granite along with the rest of his people in the process of imprisoning Antasma with the Dark Stone. Upon being freed by the Mario Bros., joins up with them in order to rescue the other Pi'illos and defeat Antasma once and for all.
- Arch-Enemy: He has the biggest beef with Antasma of all the hero characters.
- Catch Phrase: "Dreamy!" and "INSOLENCE!"
- Ermine Cape Effect: He always wears the same fancy regal outfit wherever he goes.
- Exposition Fairy: Shares this role with Starlow in the real world, takes over completely in the Dream World.
- Face Fault: He does several along with the Mario Bros. The most notable one is when the Zeekeeper turns the remains of the Dream Stone into a bunch of coins; Dreambert plants on the ground so hard out of shock that he has trouble getting back up.
- Healing Hands: He heals Mario at least once per turn during the final battle with Antasma.
- Mad Libs Catch Phrase: "Be one with ____".
- No Sympathy: He doesn't sympathize with Antasma when Bowser betrays him; instead, he mocks him for it. Unsurprising, given what Antasma did to him and the rest of his species.
- Pals with Jesus: With the Zeekeeper.
- Royals Who Actually Do Something: Beyond being an Exposition Fairy and letting Luigi sleep on him to open dream portals, he absorbs the power of the dark roots growing in Neo Bowser Castle, directly fights with Antasma alone and later assists Mario in finishing off the villain. He also trains Luigi on a lot of dream world moves, stating that he has a lot of experience with using them.
- Voluntary Shapeshifting: He can change into a pillow so that Luigi can sleep on him and access the Dream World.
The proprietor of Mushrise Park, "Boss" Brickle is a gruff Brock who won't tolerate any slack in his employees.
- A.I. Is a Crapshoot: Occurs with his Grobot when it gets bonked by the remains of the Park's fountain.Brickle: IT'S ON DA FRITZ!
- Gadgeteer Genius: He built many of the fountains and other structures in Mushrise Park, and also constructed Grobot to water flowers.
- Jerkass: Did he really need to play a wild goose chase with the bros just to lend them his pillow?
- Jerk with a Heart of Gold: Though he's mostly this. His dreamy counterpart being a "rival" going after the bunny not knowing the Bros were after the nightmare chunk while still helping the bros with attack pieces, training them on how to use Luiginary attacks, and healing them completely at a few points reflects his real world interaction with the bros.
- Laser-Guided Karma: His unnecessary getaway from the brothers causes a whole lot of trouble in his beloved park. First, he gets stuck in the park's main attraction - a fountain - and then is pushed off using high water pressure, which also causes the fountain to skyrocket all the way above the island to break the player's top screen. Then, the fountain falls down on the park's maintenance robot which causes it to have a malfunction and go irate at the administrator's hut. Finally, Brickle tries to calm down his creation and is mercilessly tossed away like a ragdoll. When all it's over, he's crushed. In the end he admits it was his own fault that the Humiliation Conga happened and apologizes to the Bros for all the trouble.
- Long Pants: It's a little hard to tell if those are just high blue work boots or if those are also his pants.
- Pink Girl, Blue Boy: The blue boy to Britta's pink girl.
A female Brock who works tirelessly in Dozing Sands to break rocks with her Shelltop crew. She is just like Brickle, but she's harsher to her employees, threatening to fire them at every chance she gets.
- Distaff Counterpart: She's basically a female Brickle in terms of her personality and even her speech patterns.
- Demoted to Extra: Only runs a shop in the dream world.
- The Dreaded: Her employees are deathly afraid of even accidentally making her angry.
- Greed: She wants the treasure that she believes to be atop the sand flow the Mario Bros. are trying to get up, even ordering them to stay put while she goes forward.
- Jerkass: She's awfully mean to her employees.
- Jerk with a Heart of Gold: Deep down inside she's this.
- Long Pants: As with Brickle above, only pink.
- Not Quite Dead: During the funny aftermath of being attacked and swallowed by Torkscrew. Her Shelltop workers see her lose consciousness and lament her apparent death as dramatic music plays and the screen starts fading to black, only for her to declare she's not dead.
- Pink Girl, Blue Boy: The pink girl to Brickle's blue boy.
A wise Pi'illo person who has vast knowledge of everything that is Pi'illo related.
- Collection Sidequest: He hands out rewards for freeing increasing numbers of the petrified Pi'illos, culminating in the Zee Egg.
- Everything's Better With Bunnies: Has a pet fluffy rabbit in the Dream World. Why that bunny was holding him captive in a nightmare chunk, running away from their potential rescuers is strange, but it could be because Dreamy Brickle was chasing the bunny itself.
- Pals with Jesus: Turns out he's a good friend of the Zeekeeper, the island's legendary guardian deity.
Dream Stone SpiritThe spirit inhabiting the Dream Stone artifact that the heroes are trying to retrieve from Bowser and Antasma. It does not like being awoken from sleep.
- Berserk Button: Waking him up from a peaceful sleep can end horribly for you.
- Blow You Away: One of Robo-Drilldigger's attacks involves launching tornadoes.
- Disproportionate Retribution: Don't want to be disturbed from sleep? Just smash the people trying to get your help with a giant robot.
- Humongous Mecha: Robo-Drilldigger is formed by a bunch of gears and drills the Dream Stone's spirit pulls together, and it's the first Giant Luigi boss.
- Jerkass: So you just want some information on where the real world Dream Stone is. Well, he'd be happy to... NOT TELL YOU! You still insist? SHADDUP! SHADDUP! GO TO SHADDUPVILLE! Oh, you've bumped into it with a Luigi stack? GET THE BIG GUNS OUT!
- Light Is Not Good: One would expect the spirit of the Dream Stone to be benevolent. He's not. At all.
- This Is a Drill: Robo-Drilldigger.
- Worthy Opponent: He is so impressed by Luigi's fighting prowess that he decides to tell just him where the Dream Stone went.
- What Happened to the Mouse?: Goes into a more permanent sleep nearing the end of the game, so his reaction to having his stone destroyed is never seen. This also makes you wonder if there's a dark stone spirit and what happened to it.
The Massif BrothersTwo Hooski brothers who serve as the tour guides for Mount Pajamaja and are a little too much into fitness, rock climbing, and BEEF.
- Difficulty Spike: Big Massif. The game stops pulling punches the moment he is introduced into the plot.
- Fastball Special: One of Big Massif's attacks basically consists of his allies volleyballing him around before striking him towards Mario.
- Flunky Boss: Big Massif.
- Hidden Depths: As tour guides of Mount Pajamaja, they feel the need to research parts of the mountain they never knew about beforehand just so that they can provide a greater experience to future tourists. In other words, they also happen to be scientists who specialize in anything that involves said mountain.
- Also, notice that they never experience jealousy over being outperformed, instead they're impressed, deeming the Mega Pi'illos as "muscle lords" for opening the gate that they couldn't budge, and Mario and Luigi as "mountain maniacs" and "prime steak" for having completed tasks that the Massif Bros couldn't and even gives the Bros credit for finding the treasure. It makes sense when you remember they want everyone to be their "beefiest".
- Big Massif's dream and his dreamy disciples shed some light on aspects of his personality as well.
- Kill One, Others Get Stronger: Big Massif gets rather angry and gains a power boost for each of his Mooks that you kill.
- Large Ham: They even refer to themselves as "huge hams" at one point.
- Punny Name: Massif sounds like massive.
- Recurring Element: Like with the Hammerhead Bros. and the Jellyfish Sisters in Superstar Saga and the Junior and Elder Shrooboids of Partners in Time, the elder sibling is red and the younger sibling is green.
- Shockwave Stomp: Big Massif's most powerful attack. Also one of the chase attacks, so he will do it repeatedly!
- Sleeves Are for Wimps: Both of them wear sleeveless shirts.
- Testosterone Poisoning: Played for Laughs
Dr. SnoozemoreThe proprietor of Pi'illo Island in the absence of the Pi'illos themselves, Dr. Snoozemore is a scientist researching sleep.
- Russian Reversal: "As you may know, I research sleep... clearly sleep also researches me..."
The SeadringsFour seahorse-like creatures, these siblings live in Dreamy Driftwood Shore and help the Mario Bros. in their efforts to hide Peach from Bowser and Antasma by expanding the Dream World with their Dream Eggs. They consist of: Seadric, the eldest; Seabelle, a Valley Girl obsessed with her looks; Seatoon, a young boy obsessed with Saturday morning cartoons; and Seabury, a would-be stand-up comedian.
- Actually Pretty Funny: Luigi laughs at the last of Seabury's puns after a series of Face Faults from him, Mario and Dreambert.
- Compliment Backfire: While he's on the phone, Seadric calls Dreambert a "fluffy pillow dude." You can see Dreambert visibly fuming in anger behind the guy's back.
- Mr Seahorse: Being actual seahorses, it's unsurprising that the brothers are just as capable of producing eggs as the sister.
- Pungeon Master: Seabury likes to crack jokes. Most of them result in a Lame Pun Reaction from the Mario Bros.
- Valley Girl: Seabelle.
A Pi'illo who is able to craft special beds.
- Ambiguously Gay: As said by Dreambert, Bedsmith likes to nap on people. But even the prince's reactions make this trope resurface. Doesn't help with Bedsmith swooning at every magnificent event and declaring that he needs to nap on the bros.
- Bunny-Ears Lawyer: He's the best there is when it comes to crafting beds, though his... weird behavior could lead you to believe otherwise.
- Eccentric Mentor
- His Name Really is "Barkeep": He's a bedsmith... and his name is Bedsmith.
- Punctuated! For! Emphasis!: All the time. "BEDSMITH! IS! THRILLSMITH!"
- Third-Person Person: Bedsmith refers to himself in third person.
A sacred rainbow-colored bird who is known as the protector of Pi'illo Island. It hasn't been seen in ages.
- Classical Tongue: The Zeekeeper has this style of diction, until you beat him. He slips back into this a few times here and there
- "Get Back Here!" Boss: What his Giant Battle mostly amounts to.
- The Gods Must Be Lazy: The Zeekeeper beat the tar out of Antasma centuries ago, but nowadays he'd much rather just nap. Unless he's bribed with absurd amounts of money.
- Hypocritical Humor: In the ending, he lectures everyone on the dangers of depending too much on material goods...and immediately flies off while squawking about how much he loves money.
- Jive Turkey: Bonus points for actually being a bird."DREAMBERT, MY MAN!"
- Kansai Regional Accent: His true manner of speech in the original version. Translated as Totally Radical.
- Money Fetish: He loves coins.
- Noble Bird of Prey
- Pals with Jesus
- Dreambert is a "dawg" friend of his.
- Eldream is also one. Or rather, "ELDAWG!"
- Physical God He's barely fazed after getting the tar beaten out of him by Giant Luigi, and goes on to blast Bowser's castle out of the sky in a single move.
- Retired Badass: He considers himself to be this, which is why he has to be bribed to save the world at all.
- Third Eye: Where his laser beam is fired from.
- Totally Radical: What he talks like for REAL, dawg.
- Your Size May Vary: While it's common for RPG characters to appear at different sizes between the overworld and battles, the Zeekeeper deserves special attention as the Mario Bros. engage him in a Giant Battle even though he's not that big in the overworld. Of course, being a Physical God, he may have made himself bigger.
- Walking Spoiler
"SCREEEK! I vanted to steal Peach's power... but I changed my mind! You are much stronger... and evil! SCREEEONK! Vork vith me! SCREEEP!"A living nightmare creature from the Dream World. During her visit to Pi'illo Island, Princess Peach is kidnapped by Antasma when Luigi opens a portal to the Dream World, causing the Mario Bros. to set out and rescue her. When Bowser appears, he proposes a partnership with the Koopa King to further his goals. This proves to be a mistake, since Bowser ends up stabbing him in the back at the end.
- Advancing Boss of Doom: During the final battle, one of his attacks is to chase Mario while tossing explosive spheres at him. And if one of his attacks puts Mario to sleep, he can enter his dreams and chase him while spitting fireballs at him.
- Arch-Enemy: To Prince Dreambert.
- Bat out of Hell: He can turn into a small bat, or a swarm of small bats. He is also referred to as the Bat King, and used to be a normal bat before feeding on the nightmare of a Pi'illo.
- Big Bad Duumvirate: He forms one with Bowser, once he decides that Bowser's power is far more useful to him than Peach's. It backfires horribly for him later.
- Big Bad Wannabe: Antasma holds the dubious honor of being the first major Mario RPG villain to end up overshadowed by Bowser as a threat. To his credit, it isn't due to a lack of competence, but due to Bowser himself getting over his own case of such.
- Boss Remix: The music that plays during the first and final battles with him is a remix of his Leitmotif.
- Breath Weapon: Spits out fireballs during the final battle with him.
- Casting a Shadow: Has powerful dark magic.
- Classic Villain: Representing Ambition and Pride.
- Composite Character: He's basically a combination of all the previous Mario and Luigi antagonists (Cackletta, Dark Fawful, the Shroobs, and the Dark Star).
- Curb-Stomp Battle: The fight between him and Dreambert near the end starts out dead even, until he takes the fight to the Dream World where his power is at maximum. Dreambert is sent tumbling out of the Dream World in a heap just a few seconds later.
- Deal with the Devil: Makes one with Bowser, promising him that he would have Peach all for himself once they took over the world. He finds out all too late that he wasn't the devil in the deal.
- Demonic Possession: He's capable of possessing others.
- Don't You Dare Pity Me!: Says this to Dreambert after the latter mocks him for Bowser's betrayal.
- Dream Walker: Especially once he reveals that he now has the ability to create portals to the Dream World at will.
- Dream Within a Dream: If Mario is hit Antasma's bat attack in the final battle with him, he'll fall asleep and Antasma will enter his dreams and chase him. The X version can induce this on ALL of his attacks.
- Dropped a Bridge on Him: Well yes, you do get to fight and beat Antasma fair and square, but the issue is in the death itself. No villainous rant or Final Boss shenanigans like the unique villains in the last three games, he just... swells up and ultimately explodes like any other regular boss after defeat.
- Emotion Eater: His backstory states that he was a bat who fed off the nightmare of a Pi'illo. This was how he became the nightmare creature he is now.
- Evil Counterpart: Serves as one to Dreamy Luigi. The parallels between them are reflected perfectly in the fight with Bowser. Both characters are capable of manipulating the Dream World to their advantage. Both are capable of enhancing their allies abilities. And both can split into smaller clones of themselves.
- Eviler Than Thou: Inverted. He finds out the hard way that Bowser was this to him.
- Final Boss: Subverted. Antasma is the second-to-last boss in the game (and one of the toughest, especially in the Battle Ring), though he counts as this for the Dream World since he's the last boss fought there. The real final boss is Dreamy Bowser, which is fought in the real world.
- From Nobody to Nightmare: Almost literally, as Antasma was originally a bat who became what he is after feeding on the nightmare of a Pi'illo. And then Bowser singlehandedly throws him back to nobody status.
- Fusion Dance: Much like Dreamy Luigi, he can fuse together with others to make them more powerful. He does this in the first fight with Bowser.
- The Heavy: Played with. He drives most of the plot along at the beginning, but after Neo Bowser Castle is summoned, most of the direct conflict comes from Bowser's Koopa Troop. Though he is talked about, Antasma only enters the stage again in the final parts of the game, along with Bowser.
- Humiliation Conga: Betrayed by Bowser, mocked by Dreambert, and beaten by Mario all in the spam of a minute.
- I Am A Humanitarian: During the final battle, he can trap Dreamy Luigi in one of his Antasmunchies, and if he happens to eat the one containing Dreamy Luigi, he'll become even more powerful than normal (And gain a green aura not unlike the one Mario gets when merging with Dreamy Luigi). Eventually he'll spit Dreamy Luigi back out, though.
- Interface Screw: He can flip the screen over during one of his attacks.
- Lean and Mean: When he fights, he turns into a taller and slender version of his true form.
- Leitmotif: "Antasma's Theme."
- Make Me Wanna Shout: Can fire supersonic waves as a bat.
- Me's a Crowd: Can create duplicates of himself during the final battle, as well as split into swarms of bats in all battles with him.
- Meaningful Name: His name comes from "phantasma", which is Latin for phantom or apparition.
- My Name Is ???: During the first battle with him, he is refered to as "????".
- No Cure for Evil: Averted. During the final battle, he can hibernate to regain health.
- Obviously Evil: From the moment he first appears, it's obvious that he's the bad guy. Lampshaded by Bowser.
- Our Vampires Are Different: Antasma is awfully similar to a Classical Movie Vampire without actually being a vampire. This includes the wardrobe, the fangs, the Vampire Vords, and the bat association. Certain translations base his name on "Count" and/or "Dracula," and his battle music even sounds like something that wouldn't be too out of place in a Castlevania game.
- Pragmatic Villainy: It was pretty obvious that he just teamed up with Bowser for convenience. Unfortunately for him, Bowser also anticipated this and planned to double-cross him.
- Pop Goes the Human: How he dies. He inflates like a balloon and explodes.
- Power Floats: Justified in that he doesn't seem to have legs.
- Recurring Boss: You fight him three times.
- Red Baron: The Bat King.
- Red Herring: Antasma is a Composite Character of all the previous Mario & Luigi antagonists, so you'd think he'd be the Big Bad of the game right? Wrong! he's upstaged by the Bros.' long-time Arch-Enemy and no-longer Butt Monkey, Bowser.
- Red Oni, Blue Oni: The blue to Bowser's red. Even reflected in their colors.
- Royals Who Actually Do Something: Is referred to as the Bat King, although whether this is an actual title or merely self-appointed is never explained.
- Sealed Evil in a Can: Was imprisoned in the Dream World prior to the game.
- Slasher Smile: His default expression.
- Smoke Out: Is first seen as a cloud of smoke.
- Smug Snake: He's a dangerous threat, but his overconfidence is what ultimately leads to his downfall as he was caught completely off guard by Bowser's betrayal.
- Sorcerous Overlord: What he became after feeding off the nightmare of a Pil'llo.
- Sphere of Power: An odd variation of the trope. During the final battle with him, he surrounds himself with black orbs called Antasmunchies that he can eat to power up his attacks. They can also be used as explosives and can come to life to protect him.
- Super Strength: Despite being a bat, he capable of airlifting Bowser around with ease.
- Taking You with Me: Before he was imprisoned in the Dream World, he shattered the Dark Stone and its fragments turned the Pi'illos to stone.
- Thinking Up Portals: During his fight with Dreambert, he reveals that he used the Dream Stone to give him the power to open portals to the Dream World at will to prevent future imprisonment.
- Unwitting Pawn: He ends up being one to Bowser.
- Vampire Vords: Speaks with a heavy Slavic accent.
- Verbal Tic: His tendency to screech like a bat while talking. Mocked constantly by Bowser.
- Villainous Breakdown: Bowser's betrayal makes him go from confident to screeching mad as he vows revenge on the Koopa King. He then attacks Dreambert in retaliation.
- Voluntary Shapeshifting: He can transform into a bat, a cloud of smoke, a pillow, his true form, and a larger version of his true form.
- Warm-Up Boss: Is first fought at the beginning of the game.
- The Worf Effect: Antasma was all set to kick ass and take names... Then Bowser double-crossed him. To put this into perspective, he went From Nobody to Nightmare then back to nobody. Ouch.