Main characters: The Mario Brothers | Allies (The Princesses) | The Koopa Kingdom (Bowser — Bowser Jr. — The Koopalings — Other High-Ranking Subordinates — Bosses) | Assorted Nasties
RPG characters: Super Mario RPG | Paper Mario (64 — The Thousand-Year Door — Super — Sticker Star — Color Splash — The Origami King) | Mario & Luigi (Minion Quest: The Search for Bowser)
Spinoff series: Yoshi's Island | Luigi's Mansion | Mario Golf | Mario Tennis | Super Mario Maker | Donkey Kong series (Kongs) | Wario series (Wario and Waluigi)
Crossovers: Punch-Out!! | Super Smash Bros. | Mario and Sonic at the Olympic Games | Skylanders | Mario + Rabbids Kingdom Battle
Other media: Super Mario Bros. (1993) | The Super Mario Bros. Movie
Characters from Paper Mario: Sticker Star.
A Sticker fairy who is the caretaker of the Royal Stickers.
- Chuck Cunningham Syndrome: Kersti is one of a few Sticker Star characters who doesn't reappear in Mario & Luigi: Paper Jam. Justified in that her home, the Sticker Comet, passes by the Mushroom Kingdom only once every year. She's not mentioned at all in Paper Mario: Color Splash, either.
- Disney Death: Mario's wish is to revive Kersti after using her as a sticker.
- Heroic Sacrifice: Turns herself into a sticker in the final battle, so as to lend Mario enough power to defeat Bowser. Her sacrifice doesn't stick, as Mario wishes her back to life afterwards.
- Jerk with a Heart of Gold: She's a serious loudmouth who seems to enjoy picking fights, but underneath it all she's got a good heart.
- Meaningful Name: In addition to being an anagram of "sti[c]ker", it also sounds a bit like "curtsy", a fitting name for the caretaker to a group of Royal Stickers.
- Misplaced Retribution: She gives Mario a vicious chewing-out when she mistakes him for the one who shattered the Sticker Comet. Even when he explains himself and that it was Bowser who did the deed, she still coerces him to help fix it by arguing that's what the world-famous Mario would definitely do.
- No Indoor Voice: Has a habit of screaming at the top of her lungs with every other sentence, while simultaneously proclaiming how much of a lady she is.
- Spirited Young Lady: She's often self-described as a Proper Lady, but owing to her bossy nature and hot temper, "spirited" is perhaps the kindest way of putting it.
- Swallowed Whole: Kersti gets swallowed by Petey Piranha in the last level of World 5. This means that you can't use Paperization and the Battle Spin feature until you get Kersti back.
- Takes One to Kill One: She lets Mario use her as a sticker in the final battle, realizing that the might of Bowsers Royal Sticker can only be matched by equal power hailing from the Sticker Star.
- Undying Loyalty: She's dutiful to the Royal Stickers, if nothing else. To the point where she refuses to give up one in order to save another, as her self-sacrifice would indicate.
- A Dog Named "Dog": As evident above, this Wiggler doesn't actually have a name-name. This continues even into his Flutter transformation.
- Beware the Silly Ones: Wiggler is very nice and absentminded most of the time. However, he gets very upset over the poison polluting his forest and island. Before getting to the final area in World 3, he storms out of his tree house and beats Mario to the beach.
- Journal Comic: If you take the Wiggler segments to particular areas in the forest, then Wiggler's diary (in third-person) would include drawings of those events.
- The Load: The Wiggler Segments are pretty annoying to deal with when they're separated from Wiggler himself.
- Mini-Boss: You fight each of Wiggler's segments after Kamek separated Wiggler from his main body.
- Out-of-Character Moment: It is rare that you get to see Wiggler being angry. Which is strange since Wigglers are known for being cute, but temperamental.
- Third-Person Person: Usually refers to himself as Wiggler, and later Flutter, instead of using first person vocabulary.
- Treehouse of Fun: He lives in a treehouse.
- Art Imitates Art: Several "Great Wave[s] off Kanagawa" by Katsushika Hokusai can be seen during the Cat-o-Luck animation in Color Splash.
- Bilingual Bonus: The Battery actually sings in German: "Listen up you fools, Listen to the battery!"
- Bland-Name Product: The Battery is appropriately called "Thunder".
- Blow You Away: The Fan, on a planet-size scale in Color Splash.
- The Cameo: Birdo appears during the Balloons card animation.
- The Fan also makes a brief appearance in The Origami King, where it blows away all the fog surrounding the Great Sea so the group can explore it further.
- Camera Abuse: The Fan in Sticker Star blows the opponents away who ends up pinned against the screen.
- Disney Acid Sequence: The Cat-o-Luck in Color Splash. It is mostly a Played for Laughs Cliché Storm since it is a Japanese game, as its animation includes everything it can like Cherry Blossoms, sushis, and samurais to make it look like it is coming straight from a Widget Series.
- Drop the Washtub: The Basin.
- Maneki Neko: The Cat-o-Luck.
- Musical Assassin: The Battery summons lightning bolts by singing Opera.
- Same Character, But Different: Some Things return in Color Splash but have a completely different effect:
- The Magnifying Glass goes from being Solar-Powered to making Mario giant.
- The Balloon becomes "Balloons" in Color Splash, and goes from exploding to lifting enemies out of battle.
- There's also an example with the Scissors Thing when it returns in The Origami King, where it's portrayed as a major antagonist. Also, unlike Sticker Star where the Scissors cut up Bowser Junior and he's overall fine, this time when it cuts up Junior, it leaves him nearly dead and in need of immediate healing.
- Shock and Awe: The Battery card.
- Shout-Out: The Fan in Color Splash is very reminiscent of the famous last shot from 2001: A Space Odyssey.
- Sudden Name Change: Since there is only one type of battery Thing in Color Splash, the D-Cell Battery is simplified as just "Battery".
Well, more like 16 Goombas, with one of them being the boss and having his mind warped by the Royal Sticker.
- Character Tics: He keeps mentioning the words "shiny" and "glittering." Really though, that's pretty much how every boss acts like under the control of a Royal Sticker.
- Cool Crown: The Royal Sticker on his head.
- King Mook: Of the Goombas. Which makes one wonder where did the actual Goomba King go.
- Screw This, I'm Outta Here: Megasparkle Goomba's cohorts decide that they'd rather be regular Goombas rather than keep working for him.
A Pokey on top of Drybake Stadium that has been under the control of the Royal Sticker. He was once just a regular Pokey before Kamek placed the Royal Sticker on top of him and split the stadium into three parts.
- Batter Up!: His major weakness once all of his segments have been exposed.
- Character Tics: He keeps mentioning the word "shiny". As with Megasparkle Goomba, this isn't a unique trait.
- Flunky Boss: He may summon two Pokeys (the ones that you can actually jump on) to help him. Of course, you will have to defeat them first before getting Tower Power Pokey.
- Foreshadowing: His weakness is basically why Drybake Stadium is called that in the first place. There's also the hint of "PLAY BALL!" at the beginning of the battle. However, you don't find this out until the roof of said level, rather than the floors preceding it.
- King Mook: Of the Pokeys.
- Uniqueness Decay: A second Tower Power Pokey appears in Mario & Luigi: Paper Jam. This one looks like a normal Pokey with four small spikes on every segment. Also, he's much smaller than the original.
- Wake-Up Call Boss: He has 300 HP (compared to the first boss, which has less than 100 HP), 10 Defense, and can deal 5 to 10 damage per turn. Also, if you didn't realize that a certain Thing needs to be used to defeat him, you'll be in serious trouble.
A Mr. Blizzard who wished for a body that would never melt. When the Royal Sticker landed on him, he got his wish... at the expense of his sanity.
- A Dog Named "Dog": Zigzagged Trope. While it is the name of his species, it's never been spelled like this before.
- Alas, Poor Villain: All he wanted was a body that wouldnt melt. He even apologizes after you beat him.
- Anti-Villain: Of the Woobie variety. He only wished he cannot melt.
- Back from the Dead: After being seemingly killed after his battle, he returns during the stick-puppet esque credits.
- Be Careful What You Wish For: His backstory is that he was a regular Mr. Blizzard who was melting and wanted to live. He wished for a body that could survive spring... and the Royal Sticker landed on his head.
- Butt-Monkey: He was melting. He prayed for a longer life, and was given it at the cost of his sanity. He was then given a thorough beating by Mario due to the insanity. Then he melted right after regaining his sanity.
- Chuck Cunningham Syndrome: Mizzter Blizzard is one of the few Sticker Star characters who doesn't reappear in Mario & Luigi: Paper Jam.
- Dying as Yourself: Technically, he doesn't die, he melts and lives on as water vapor, until Winter comes.
- An Ice Person: He's a snowman, who has a series of shells that are made of even more snow, and he is the boss of the ice world. It's practically assumed.
- Good All Along: Can we honestly say he was evil?
- Matryoshka Object: The Bowser Snow Statue shatters as it accumulates damage, revealing further, smaller statues within.
- Posthumous Narration: The section of the storybook that appears after beating Mizzter Blizzard is told in the first person, and it's obviously Mizzter Blizzard speaking. It's unknown if he narrated the rest of the book, though.
- Snowlem: An absolutely massive one. He is actually multiple Snowlems, which are encased inside of each other.
- Token Good Teammate: Out of all the characters to wear the Royal Stickers, Mizzter Blizzard was the only one not to have malicious intentions. He just wanted to not melt.
- Tragic Ice Character: Mizzter Blizzard used to be a living snowman who was terrified of melting, so he wished on the magical Sticker Star to grant him a body that wouldn't melt. The Sticker Star granted his wish... but also took away his sanity, turning him into a violent Snowlem.
- Walking Spoiler: For the sole reason that he actually has a personality and isn't evil.
- We Will Meet Again: Inverted. After regaining his sanity and retaining his consciousness as air moisture, he says he'd like to see Mario again, when he's rebuilt as a Snowman come Winter.
- With Great Power Comes Great Insanity: Like all other bosses. Then you beat him and, for the first time, there's a case of a boss showing the extent of the Royal Stickers' power over one's mind. It's rather sad.
- Black Market: Knows the existence of one.
- Character Tics: Mentions the word "perky" a lot.
- Everybody Knew Already: If you already found the secret Thing market Toad already, then he'll still tell you as if you don't know what to do if you don't have any Things.
- No Name Given: As with most other Sticker Star-introduced characters, SaT Toad doesn't actually have a name-name.
- "Begone" Bribe: One way to get rid of the goons. Of course, you can choose to fight them.
- Butt-Monkey: Constantly beaten up and harassed by the locals of every chapter.
- Boss in Mook's Clothing: The Shy Guys bullying the Toad. They are a lot tougher than they appear to be. And the reward for helping him that time is a Secret Door sticker.
- While that fight is the toughest, most of the fights involving him are special. One introduces the Two-Fold Goombas, one is the only fight with a Multi Fold Paragoomba, and a fight with Spear Guys that SEEMS normal, but there's really a huge crowd of them watching. The Poison Bloopers seem to be the exception.
- Her Code Name Was "Mary Sue": He sends postcards to the Toad watching his house, which detail how he was able to defeat multiple foes that menaced him on his adventures. In actuality, Mario is the one who defeats everyone that harassed him.
- No Name Given: As with most other Sticker Star-introduced characters, the travelling Toad doesn't actually have a name-name.
- Unreliable Expositor: The postcards he sent to a friend of his are correct except for the parts where he claimed that he beat up a bunch of goons. The truth is that the goons were picking on him and that it was Mario who saved him so the stories end up being a bit exaggerated. He later admits that he was lying to a friend of his.
- Collection Sidequest: The instigator of one. He asks Mario to bring him one copy of every sticker he can find; that includes Thing Stickers.
- No Name Given: As with most other Sticker Star-introduced characters, the Curator doesn't actually have a name-name.
- Overly Narrow Superlative: He advertises his Sticker Museum as the greatest Sticker Museum of the Mushroom Kingdom as it is the only one.
- Video Game Cruelty Potential: You can leave him stuck under the fountain for the entire game, as you may not get the hint to use paperization to free him.
- The Wiki Rule: His museum uses the "Sticky Wiki" with the entries written by an intern of his.
- A Dog Named "Dog": The host's name is "Snifit" and he's a Snifit. Otherwise, he doesn't actually have a name-name.
- Friendly Enemy: He's clearly against Mario as his questions reveal that he thinks that Bowser is straight-up cooler than Mario. The only thing that's considered harmful that he did to Mario is filling the room with poison gas.
- Ladies and Germs: "Gentlebuddies" and "Goodbuddies' are variants of his introduction.
- Nice Guy: He acts like one, but some dialogue of his such as "unpaid Snifit interns" suggest he can be a Jerkass too.
- Studio Audience: According to one of the answers to his questions, there are 30 Snifits in the audience.
- Whack-a-Monster: One of his challenges is to whack 20 "unpaid Snifit interns."
- Background Music Override: The Disco Boos do this to the battle theme.
- Boss in Mook's Clothing: The Boo Stack should not be underestimated if you want the battle to end quickly. Luckily, the obvious hints in the bookshelves should tell you to use a certain sticker.
- Eldritch Abomination: The monsters that the Book of Sealing seal...is not this. The way the steward describes the Boos made them sound pretty horrible, even though that they're more fun rather than spooky.
- Gratuitous Disco Sequence: At one point, Mario interacts with a picture frame with a Boo in it. It's then revealed to be 5 Boos... and then disco music starts playing.
- One-Hit-Point Wonder: One of the Boos is crumpled in the trash, and has only 1 HP. Any attack will do him in.
- Ghostly Chill: A Boo is pretty much the main reason why he's feeling cold in front of a campfire.
- Irony: One of the papers you can find in World 5-1 in the huge trash pile is an ad for a new manservant. After the Enigmansion has been cleared of Boos, the steward thinks of hiring a new servant. He becomes one again to his old master.
- Nice Guy: He's pretty hospitable and says that not sitting down with him to relax is against his hospitality.
- No Name Given: As with most other Sticker Star-introduced characters, the steward doesn't actually have a name-name. As a matter of fact, he introduces himself as just a humble servant.
- Portrait Painting Peephole: A portrait of him has one sort of peephole where if Mario looks away from it, a Boo will pop out to replace his face.
- Back from the Dead: Thanks to Mario and Kersti using Paperization, he returns to life.
- Military Salute: Does one to Mario after he and Kersti hop on to one of the ski lifts.
- Nostalgia Filter: Subverted. A music player that plays a tune that sounds very old-fashioned is liked by his servant, but the owner, who is older than him, doesn't like it that much and wonders why the current generation likes it.
- No Name Given: As with most other Sticker Star-introduced characters, the Forebearer doesn't actually have a name-name.