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The protagonists of the story, a group seeking to find and unlock the Phoenix.
Genki Sakuraexcitable Hero, who gets transported to the series world by a prototype game, something he takes extremely well, all things considered. Brash and impulsive, but his boundless energy and enthusiasm can prove catching.
- Ascended Fanboy: He was a fan of the games, and then goes inside one.
- Badass Normal: Being only human, he obviously doesn't have any special attacks like monsters. That doesn't stop him from fighting right alongside them.
- Brown Eyes: Which are stated to be very clear and honest.
- Character Development: He's pretty rash and dumb in the first season, but by the third he's grown into a seasoned fighter and mature young man who's learned the value of strategy as well as strength.
- Crossdressing Voices: Japan only.
- Curtains Match the Window: Brown eyes, brown hair.
- Determinator: Is he ever.
- Deus Exit Machina: Gets separated from the others a few times, typically to set up his Big Damn Heroes return.
- Dub Name Change: The dub changes the Japanese on the envelope Genki receives in Episode 1. Now in English, the mail address lists him as "M. Genki" of "Allenville". However, the dub dialogue never changes Genki's family name, nor does it ever suggest that Genki doesn't live in Japan.
- Empowered Badass Normal: He's seen focusing energy in order to attack, as well as transferring it to others and putting it into his attacks. Later on it is shown he can launch Combined Energy Attacks and, in the last two episodes focus the energy of everyone they know, combining the bodies of several of his friends and reviving the Phoenix.
- Face Death with Dignity: Best illustrated during "Magic Stone Mayhem" when most of the Searchers are cornered and about to be executed via firing squad; while everyone else flinches, he just stands there glaring.
- Foreshadowing: Could he actually be part of the Phoenix? Not exactly.
- Hope Bringer: Helps inspire Golem, Tiger, and Hare to fight Moo.
- I Just Want to Be Special: He really wanted to visit the world of Monsters.
- Jumped at the Call: He may not have been expecting to be sucked into the game world, but he sure doesn't have any issues with it. Particularly the second time around.
- Just a Kid: Gets this reaction at first.
- Keet: As his name states, he's full of boundless energy.
- Kid Hero: Stated to be 10.
- Meaningful Name: He even tells the others outright "[My name] means energy, and I've got lots of it!"
- His last name, Sakura(佐倉) is a homophone with the word Sakura(桜) which means cherry blossoms, which are a symbol of death and rebirth.
- The Power of Friendship: Firm believer in this, and very good at rallying the others.
- Rollerblade Good: His rollerblades were sucked into the game along with him, and he grows very adept at fighting with them on (though he doesn't need to wear them to rumble. They just provide a very good speed boost for him. Plus, you know, impacts connect a lot harder with wheels on).
- Super-Strong Child: For a pre-teen, Genki can carry Pixie or Holly without effort, fight monsters with his fists, and lift a boulder over his head.
- Trapped in Another World: Much to his delight.
- Vocal Evolution: Voiced by then child actor Andrew Francis in the English dub, puberty hit Francis hard between the second and third seasons, but his deeper voice worked well with Genki's emotional maturity at that point.
- Would Hit a Girl: He has no problem fighting female monsters.
- Brought Down to Normal: During the third season, he has to relearn most of his attacks.
- Cherry Blossoms: His Cherry Blossom Blizzard attack. Cherry blossoms also become his symbol, and the death/rebirth aspects come into play during the second season finale/third season opening.
- Crossdressing Voices: Janyse Jaud voiced him.
- Deus Exit Machina: Ends up on the awkward side of one when the entire rest of the team pulls one during "The Mocchi Cannon".
- Just a Kid: Gets this reaction along with Genki.
- Pokémon Speak: Averted; he appears to use this at first, but it turns out to be a very heavy Verbal Tic.
- Ridiculously Cute Critter: Mocchi is adorable.
- Third-Person Person: "Mocchi hungry!"
- Took a Level in Badass: Goes from being just a baby to one of the team's strongest members.
- Verbal Tic: "Chi!"
- Wave Motion Gun: The Mocchi Cannon.
Voiced by: Mariko Kouda (Japanese), Maggie Blue O'Hara (English)A young woman who has been searching for the legendary Phoenix with the help of her best friend Suezo and the Magic Stone, a mysterious pendant which acts as a sort of magical compass, pointing out the way they should travel. Acts as The Heart of the Searchers — all of them have joined her quest, and she in turn keeps their very different personalities from clashing to the point of tearing the team apart.
- Action Girl: While she doesn't charge into battle all the time like Genki, she does defend herself and her friends several times.
- Curtains Match the Window: Brown eyes and hair.
- Distressed Damsel: She is kidnapped by Moo during the first season, during which time she learns about her father serving as his vessel. The guys rescue her in the next episode.
- Doomed Hometown: We see how it was destroyed in episode 8; this prompted her search for the Phoenix.
- The Heart: Keeps the team from clashing quite often.
- Holly, I Am Your Father: Her father is Moo's vessel.
- Memento MacGuffin: Along with the Magic Stone itself, she also obtains a dagger originally owned by her father.
- Mineral MacGuffin: The Magic Stone, which she wears as a pendant.
- Only One Name: Her last name is never revealed.
- Skirt over Slacks: Wears these.
- Taking the Bullet: Sets the main plot of "Run, Tiger, Run!" into action when she shoves Tiger out of the way of a Black Worm's poison spike.
- Took a Level in Badass: Goes from hanging back during fights to pulling a dagger on one of the Big Bad Four.
- Tragic Keepsake: Both the Magic Stone and her father's dagger.
- Troubled Backstory Flashback: A good chunk of Episode 8.
- Awesomeness by Analysis: In season 3, Suezo is able to learn Poritoka's ultimate technique by seeing him use it once. He uses it against Mocchi for training.
- Berserk Button: Holly. Suezo will try to take on anyone he sees as a problem for her.
- Butt Monkey / The Chew Toy: Generally on the end of some mistreatment. Not one episode goes by in which Suezo isn't harmed in some way in a humorous manner (typically after being thrown into the air and somehow forgotten).
- Can't Catch Up: Suezo struggled with this; even Mocchi was able to quickly surpass him. This was mainly due to Suezo having serious difficulty with the mental powers his species tends to be better known for. Even after his Day in the Limelight episode where he managed to learn Teleport, he still couldn't catch up and had his skills mostly Played for Laughs.
- Cowardly Lion: The most likely member to panic during fights, yet still usually willing to stand his ground.
- Doomed Hometown: We see how it was destroyed in episode 8.
- Eyes Are Unbreakable: Given that he's basically a giant eyeball on a single leg, he'd be in real trouble if this wasn't in effect.
- Fastball Special: Notably, he was the one who came up with having Golem lob him into the air to give him a good look around. He quickly decided he wasn't too fond of that idea after being dropped/forgotten the first few times.
- Kiss of Death: A rarely-seen move; it was cut from the dub except for one instance when it missed.
- Large Ham: He and his (sub-)species are easily the most expressive characters in the series. It helps that they have have the chops to literally chew the scenery with.
- Oculothorax: Just an eye on a tail.
- Spoiled Brat: Holly tended to coddle him when they were younger, and didn't focus too hard on making him learn how to fight.
- Tail Slap: His primary move.
- Teleporters and Transporters: In general, Suezos should have the ability to teleport as one of their attacks. Alas, Suezo himself could never concentrate hard enough to do it. He finally gets the teleport attack, but is not very good at it.
- Took a Level in Badass: Even while remaining The Chew Toy.
GolemGentle Giant who lives in a clearing in the forest and is known as the 'enigma'. While he is the largest and most physically imposing of the Searchers, he is also the most compassionate and prefers to avoid fighting. During most battles, he acts as the team's Stone Wall. Don't piss him off.
- Berserk Button: Hurting his friends, especially Genki or Holly.
- Beware the Nice Ones: When sufficiently angered he can destroy tough monsters in one hit.
- Fastball Special: Mainly used as a way to help Suezo survey the area; also used the traditional version with Mocchi once.
- Gentle Giant: Loves birds and flowers.
- Golem: Of the stone variety.
- Heroic BSOD: In "Guardian of the Discs" after the Jells stomped on his Berserk Button and he slaughtered them in a blind rage.
- Honor Before Reason: "Undine's Lake", where he protects The Mole because he promised to before she backstabbed the group.
- Stone Wall: Usually serves as a barrier for the team to take cover behind.
- Verbal Tic: Third-Person Person who speaks slowly... and frequently pauses... during long sentences.
- Why Did It Have To Be Water?: Golem hates water. Justified since he's made of rocks and will sink like a stone in any large body of water. He also fears the potential erosion. Hilarity Ensues whenever the Searchers have to Get on the Boat.
Tiger of the Windproud and stubborn.
- Aloof Big Brother: Acted like this towards Gray Wolf to make him toughen up. It sort of backfired, given that Gray Wolf developed an inferiority complex instead that Moo magnified into full-blown Green-Eyed Monster. Also acts as one towards Genki.
- Big Brother Instinct: Despite the above, he'll still leap to protect Gray Wolf when he's in danger.
- Break the Haughty: Tiger is humiliated by Captain Dino and Hare, the former in Tiger's debut episode and the latter in Hare's debut episode. He pays them both back for it.
- Brought Down to Normal: Had to deal with the same problem Mocchi faced during the third season. He didn't take it well.
- Cain and Abel: The Abel to Gray Wolf's Cain.
- Can't Hold His Liquor: As demonstrated in a scene cut from the dub.
- Dark and Troubled Past: His brother Gray Wolf was captured by Moo and taken away, ultimately becoming one of Moo's Big Bad Four. Tiger is not aware of this last part until much later. He doesn't take it well.
- Defrosting Ice King: Takes a while to warm up to the Searchers, but when he does, it stays.
- Desert Bandits: Introduced leading a band of these.
- Deus Exit Machina: During "Tiger Meets His Match"; leads into a Really Dead Montage before his Faking the Dead plot is revealed via Big Damn Heroes.
- The Dreaded: In his introductory episode, as well as some episodes afterward. His reputation alone scares people.
- Every Scar Has a Story: His first encounter with Moo ended with him getting a nasty slice across his face and his brother's abduction.
- Glass Cannon: Very powerful, but taken out fairly quickly.
- Good Is Not Nice: He can be particularly ruthless and brutal in battle and he won't hesitate to kill if needed. Not to mention he's arrogant and overconfident at times.
- Hair-Trigger Temper: Especially around Hare.
- An Ice Person: His Blizzard attack.
- Ineffectual Loner: Tries to keep an emotional distance from everyone, and attempts to leave the group several times after learning what his brother's become. Also takes off alone during "Tiger Meets His Match", and is seemingly killed for it, though it thankfully gets Subverted.
- Irony: Tiger of the Wind was defeated by Hare farting, in a scene cut from the English dub.
- Jerk with a Heart of Gold: Standoffish and proud, but fiercely loyal to his friends.
- Loveable Rogue: Of the thief variety.
- Mr. Vice Guy: Pride is his biggest issue, along with his temper.
- Noble Wolf
- Not So Different: See Hare's entry below.
- Promotion to Parent: While his parents are never shown, he and his little brother have fended for themselves for their whole lives with Gray Wolf turning to his big brother for protection when he needed it.
- Scars Are Forever: Has a scar cutting across his face, which remained even after his Heroic Sacrifice and rebirth in a Mystery Disc.
- Shock and Awe: His lightning attacks.
- Taking the Bullet: Did it for Genki in the beginning of the 25th episode. This was also an example of a Deus Exit Machina to keep him out of the fight scenes for the other characters.
- Vitriolic Best Buds: Treats Hare with disdain and takes any opportunity to insult him, yet will leap to his defense as easily as he would the rest of the team.
HareTrickster who pulls a fast one on Tiger, then tries to con the rest of the group. When that doesn't work out quite the way he expected, he apologizes and cheerfully joins the team, acting as The Smart Guy — though his arrogance and overconfidence works against him sometimes.
- Achilles in His Tent: "Underground Adventure".
- Backstory: His past wasn't explored until the middle of the third season, making it a source of Fanfic Fuel. For the record, it turned out he used to be part of a Two Guys and a Girl team of thieves who stole from Moo, but lost both of his partners when one of their targets was actually a trap.
- Bindle Stick: Carries this; sometimes it holds tools the group uses for adventuring. Its contents weren't revealed until his Backstory finally came out late in the third season.
- Fartillery: Scenes with his Gas attack were cut from the English dub.
- Gasshole: Hare is the main source of fart jokes, thanks to Gas: a move that's only used handful of times, but it tends to be quite effective in each appearance.
- Good Old Fisticuffs: His fighting style.
- Heroic BSOD: Goes through a couple of these, but the best instance would be during "Tiger Meets His Match": upon seeing what appears to be Tiger's Lost Disc, he goes into a Thousand-Yard Stare before snapping into Unstoppable Rage.
- Innocently Insensitive: Can be this at times. While trying to get Golem on Horn's ship, Suezo lets out Golem's fear of water. Hare laughs at this, at which Holly tells him to shut up.
- Killer Rabbit: Looks harmless, but can be a very competent fighter.
- Let's Get Dangerous: Step 1: Make plan and assure friends it will work because you're a genius. Step 2: See plan fail. Step 3: Improvise.
- Love Triangle: Part of it. In the past, Wild Hare believed that he and Fairy Hare were a item and in jealousy, turned evil and plotted to tear them apart.
- Loveable Rogue: Of the Con Artist variety.
- Miser Advisor: Downplayed, Hare tends to be the one thinking about spending and raising money. Of note is "Underground Adventure", were Hare provides a cost-effectiveness analysis of going over a mountain. This leads to Tiger claiming that Hare is Only in It for the Money. Hare admits that was his original intent, but became genuinely concerned as he became part of the team.
- Mr. Vice Guy: Pride and Greed.
- Not So Different: Notice all the tropes he shares with Tiger?
- Playing with Fire: Via his Dragon Kick.
- Shipper on Deck: Of Fairy Hare and Wild Hare.
- The Smart Guy: Hare usually makes the team's plans.
- Too Clever by Half: Knows he's smart, but sometimes his plans don't work out like he expects.
- Vitriolic Best Buds: Loves to tease and trigger Tiger's temper, but just as quick to defend him.
The PhoenixA legendary bird monster who fought Moo long ago, the Phoenix can turn bad monsters to good and revive lost Mystery Discs. While now the stuff of legends, Holly believes it exists, and finding the Phoenix is the object of the Searchers' quest.
- All Myths Are True: The myth about it is perfectly accurate.
- Big Good: It serves as inspiration to the Searchers and is the only one capable of stopping Moo.
- Empty Shell: Its soul split into five monsters, leaving its body soulless.
- Living MacGuffin: It has no real personality, but is very important to the plot.
- Playing with Fire: Uses fire in beam attacks.
- Phoenix: Right there in the name!
- Sealed Good in a Can: Specifically, sealed in ice.
- Soul Jar: Its soul was split into five monsters.
- Super Soldier: It was created to end the Last War and defeat Moo.
- Tomato in the Mirror: The Phoenix's body was found, but its soul resides in five monsters—specifically Suezo, Mocchi, Golem, Tiger, and Hare.
Moo and his Followers
MooShrouded in Myth, Moo has risen and begun terrorizing the land once more. He has the power to corrupt monsters, signified by wearing his crest.
- Authority Equals Asskicking: Described as an overlord, and does plenty of fighting. His minions are convinced he's invincible.
- Big Bad: Of the first two seasons.
- Breath Weapon: His main attack in his dragon form.
- Card-Carrying Villain: Revels in his hatred and villainy, and uses evil to become even stronger. He's not played for laughs.
- The Corruption: Signified by his baddie emblem.
- The Corrupter: Moo has the ability to change good monsters into bad ones.
- Dark Lord on Life Support: After being weakened by the sun, Moo is in bad shape and is kept alive via life support while he waits for the Magic Stone as a cure.
- Demonic Possession: The body he's possessing is Holly's father.
- The Dreaded: People in areas largely untouched by him are frightened by the mention of his name.
- Emotion Eater: Hatred makes him even more powerful.
- Evil Overlord: Controls much of the world at the start of the show.
- Evil Sounds Deep: Has a very deep voice, both in humanoid and dragon forms.
- Expy: For Godzilla. From being a 100 foot tall dragon, to being a metaphor for the nuclear bomb.
- Hopeless Boss Fight: At any time before the finale, especially his first appearance in battle.
- Implacable Man: Nothing can stop him except the Phoenix.
- Informed Ability: We don't directly see him corrupting monsters.
- Knight of Cerebus: Whenever he starts doing something, all comedic and lighthearted elements are dropped.
- Luke, I Am Your Father: The body he's possessing is Holly's father. He's eventually consumed completely.
- Lost in Translation: "Mu" means darkness or emptiness. This has nothing to do with cows.
- Nigh Invulnerable: He's immune to every kind of attack.
- No Sell: Nothing hurts him except the Phoenix.
- Orcus on His Throne: Played with. Most dialogue implies he just sits in his castle all day while his minions conquer the world. He didn't know anything about the Searchers till one of his messengers told him, which prompts him to get off his throne so he can use the magic stone to find his original body, but after they escape, he doesn't bother with them even though they're searching for the one thing that can stop him. Justified in that case since he was at least doing something, finding and planning to rejoin his original body. Subverted when he does that, as he immediately goes to kill the Searchers.
- Manipulative Bastard: He's very good at manipulating the heroes' emotions to his own advantage.
- Pragmatic Villainy: Once he learns what he needs from Holly's Magic Stone, he immediately goes to look for it without telling the heroes where he's going.
- Red Eyes, Take Warning: Played straight, but averted when too much hatred makes him lose his mind, giving him yellow eyes.
- Sealed Evil in a Can: His original, dragon body.
- Super Soldier: He was created as one to decisively end the ancient war. It worked.
- Taking You with Me: His last word with the Phoenix. Realizing that the two of them are opposites fated to battle each other as long as they exist, he determines that the only way their battle will ever end is if both of them die, so he intentionally causes a Mutual Kill.
- Take Over the World: His initial goal but after he loses his mind, he turns into an Omnicidal Maniac.
- The Power of Hate: His power source.
- This Dragon is Different: His true form is basically a cross between Godzilla and a dragon.
- This Is Your Brain on Evil: He feeds on hatred. Too much hatred drives him insane.
- Unfortunate Names: See Lost in Translation. "Moo" isn't really the most intimidating name, is it?
- Weakened by the Light: At first, due to his body being imperfect. During the final episodes when he regains his strength, he flies out of the clouds and into the sunlight, unharmed.
- With Great Power Comes Great Insanity: Too much hatred makes him go insane.
- Would Hurt a Child: Kidnaps six-year-old Eve, and torments Genki and Holly.
Pixie/GranityBig Bad Four, his strongest generals. She has a serious grudge against humans, having seen them abuse and mistreat monsters for so long.
- Cleavage Window
- Cute Monster Girl: The most human of the Big Bad Four.
- Dark Magical Girl: Evil and magical, at least at first.
- Defrosting Ice Queen: Post defeat, she begins to warm up to the heroes.
- Emergency Transformation: Her fusion into Granity.
- Fairy Sexy
- Freudian Excuse: In the past she and Big Blue were treated badly by the human as their slaves. When Moo offered her to join the rank she accepted in order to get revenge on humanity and turns them into the monsters' slaves.
- Good Wings, Evil Wings: She has evil demon wings, but it's later subverted when she turns good. As Granity she has grey angelic wings.
- Heel-Face Turn: Defeat Means Friendship, though it takes a while to really kick in.
- High Heel-Face Turn: She is the only female among Moo's Big Bad Four and the only one to redeem herself pre-season 3.
- Humans Are the Real Monsters: Believes this since they imprisoned her and her kind.
- Made of Iron: While she appears to be a Squishy Wizard, especially in the first fight with her, Pixie is quite durable. In the season 2 finale she has her wings chopped off by Moo, is shocked repeatedly with the last time being continuous, is dropped to the snowy ground, and manages to hang on long enough for Big Blue to fuse with her.
- Pinky Swear: Genki does this to her during "My Name Is Pixie".
- Save the Villain: Her rematch with Genki and the Searchers ends with Genki attempting this when the ruins start coming down on their head.
- Shock and Awe/Playing with Fire: Her main attacks.
- Stripperiffic: Compared to Lilim and Poison.
- Squishy Wizard: In the dub, it took only one hit to bring her down after she'd been zapping everyone for a good portion of the fight.
Voiced by Hiroyuki Yokō (Japanese), Ward Perry (English)A Golem/Tiger hybrid and Pixie's personal bodyguard, a towering golem whose tiger sub-breed lends his stone skin an icy appearance. Stoic and stalwart, and completely loyal to his Master Pixie.
- An Ice Person: Appearance-wise anyway.
- Battle Butler: Serves Pixie loyally and aids her often in battle.
- Bodyguard Crush: Also loves Pixie.
- Golem: Of the icy variety.
- Heel-Face Turn: Along with Pixie's.
- Heroic Sacrifice: When Pixie is fatally wounded, he voluntarily fuses with her to ensure her survival, even though it means sacrificing his own existence in the process.
- Mighty Glacier: Serves to brunt several of the Searchers' attacks.
- Palette Swap: Looks exactly like Golem, but with a Tiger's blue and white coloring.
- The Stoic: Often quiet and shows little emotion.
- Floating Mask: His face is this.
- Heel-Face Turn: Like all monsters revived by the Phoenix, he was freed from Moo's influence and met the searchers again during a monster tournament. Despite some initial suspicions, both parties parted on good terms.
- If I Wanted You Dead...: With the No, Mr. Bond, I Expect You to Dine, when Genki questions if the food he offers them is poisoned, he says if he wanted to poison them he would have poisoned the water they drank outside, claiming that would easier than poisoning food, but the Searchers figure that if he did poison the water then they would have noticed by that point.
- Light Is Not Good: Has a noble color scheme and appearance, but is definitely evil.
- Load-Bearing Boss: Destroys the castle with his Gali Hurricane.
- Minor Injury Overreaction: When Genki manages to chip part of his mask in an attack, he goes ballistic and turns into a whirlwind that, while trying to get the Searchers, sucks in his own troops.
- No, Mr. Bond, I Expect You to Dine: He feeds the heroes food and water. The meal isn't rigged, but he uses the distraction to sucker-punch them.
- The Stoic: Often speaks in a completely flat tone.
- Villainous Breakdown: During which he becomes Not So Stoic.
JokerOne of Gali's followers and a Master of Illusion who enjoys entrapping his victims with his magic before dealing the final blow.
- Master of Illusion: He creates these to lure the Searchers into a trap.
- Monster Clown: As in the games, he's a floating reaper-like figure with a clown mask for a face.
- Sinister Scythe: Wields this, and also attacks with the hilt of the weapon.
- Aloof Big Brother: Deconstructed in that Tiger's treatment fed his insecurities and inferiority complex. Once Moo got his hands on that...
- Cain and Abel: The Cain to Tiger's Abel.
- Combat Pragmatist: In his fight with Tiger, he decided they'd use their claws to break the tie. Tiger agreed, but Gray Wolf then whipped his eyes with his tail, blinding him.
- Green-Eyed Monster: Insanely jealous of Tiger and his abilities, and, perhaps, his friends.
- Heel-Face Turn: Like all monsters revived by the Phoenix, Gray Wolf was freed from Moo's influence upon being unlocked again.
- Icy Blue Eyes: Upon turning evil he gains icy blue sclera.
- Not Brainwashed: Or so he insists.
- Savage Wolves
- Schemer: During their confrontation, Tiger calls him on this and says he's been coming up with Zany Schemes ever since he was a pup. (Which may explain why Tiger has such a short temper with Hare...)
- This Is Your Brain on Evil: He gains icy blue sclera and an evil temper.
- Combat Tentacles: Uses these to attack Genki and company.
- Good Eyes, Evil Eyes: Once she's revealed as the mole, her eyes change shape.
- Heel-Face Turn: Due to genuinely coming to care for Golem.
- Making a Splash: Uses water-based attacks.
- The Mole: For Grey Wolf.
- Our Mermaids Are Different: She has a Jell-like tail and tentacle arms.
- Redemption Equals Death: Notably, she believes this herself, choosing to leap into the fire Golem is trying to protect her from.
- Tentacle Rope: Snags Tiger with this; in the uncut version they use the tentacle to pull her out of the water.
Voiced by Kazuya Kobayashi (Japanese), Scott McNeil (English)The fourth of Moo's Big Bad Four, and the monster responsible for razing Holly and Suezo's Doomed Hometown.
- Bad Boss: Threw a Cabalos out the window of his cliff side castle.
- To be fair, that was one of Gray Wolf's former minions.
- Driven to Suicide: Upon seeing Genki, Holly, and the others trying to save him, he lets go of the ledge on purpose.
- Eye Beams: He uses these to attack Genki and Mocchi.
- Heel-Face Turn: Like all monsters revived by the Phoenix, he was freed from Moo's influence after Moo's defeat. He even joins the heroes temporarily.
- She's a Man in Japan: At least one foreign dub portrayed Naga as female.
- Slouch of Villainy: Is often seen lounging on his throne.
- Sssssnake Talk: Averted.
- Take My Hand: Holly attempts this with him.
Voiced by Kenyuu Horiuchi (Japanese), Lee Tockar (English)A set of Animated Armor who maintains an army of his own monsters, frozen and kept on hand for whatever tasks he cares to set them upon. While he works for Moo, he secretly plans to overthrow him.
- Animated Armor: He's a floating set of armor with a cape.
- Authority Equals Asskicking
- Big Bad: In Season 3.
- Card-Carrying Villain: His title is the Evil General Durahan.
- The Chessmaster: Plans to overthrow Moo along with Lilim.
- Evil Sounds Deep
- Four-Star Badass: A general, and with the skills to back it up.
- Heel-Face Turn: In the Season 3 finale.
- Knight of Cerebus: His appearance towards the end of season 2 marks an end to the comic relief episodes with things going From Bad to Worse even after his death since because of him Moo still got the magic stone. Also a literal knight.
- Large Ham: Has a tendency to refer to himself in the third person while shouting his lines.
- Redemption Earns Life: At the very end of Season 3.
- The Starscream: To Moo.
- Taking You with Me: His last act in the second season is taking revenge on Lilim just before his ship explodes.
- Third-Person Person: SO SAYS THE EVIL GENERAL DURAHAN!
Voiced by Haruko Takahagi (Japanese), Janyse Jaud (English)Durahan's right hand woman, specifically a Pixie/Joker mix. More conniving and evil than Pixie, and she seems to have her own agenda...
- Attack Reflector: In the dub version, Lilim reflected Captain Weed's projectile back at him.
- The Chessmaster: Has her own schemes, and is working against whoever she feels like.
- Chronic Backstabbing Disorder: She readily backstabs Moo for Durahan, but once she sees how powerful Moo is, she quickly changes her mind.
- The Dragon: To Durahan.
- Fairy Sexy
- Faux Affably Evil: She's much more evil than Pixie, and later even Duarahan is horrified by her evil deeds.
- Femme Fatalons: She sliced Captain Weed's fingers with them in the Japanese version.
- I Fight for the Strongest Side: Which makes her Durahan's own personal Starscream.
- Killed Off for Real: Near the end of Season 2. Even in Season 3, she never reappeared, though Poison mentioned her treachery a few times.
- Psychotic Smirk: When plotting something evil.
- Smug Snake: She's clever, but her plans have a tendency to be Out-Gambitted.
- The Starscream: To Moo, and later Durahan.
- The Vamp: She shows off her body quite a bit.
- Women Prefer Strong Men: This is her reasoning as to why she betrays Durahan.
Voiced by Keiko Han (Japanese), Pauline Newstone (English)A vain Mew/Pixie type who appears in Season 3 under Durahan. She often buys exercise gadgets to look her best and one-up Poison.
- Berserk Button: Don't ever say that Poison is more beautiful than her, and don't call her an old hag.
- Cute Kitten: She looks like one, though she sounds and acts older.
- Dark Action Girl
- The Dragon: To Durahan in Season 3.
- Eye Beams: One of her most dangerous abilities.
- Fiery Red Head
- Larynx Dissonance: Her voice sounds deeper than you'd expect for a plush toy.
- Not-So-Harmless Villain: Don't make her angry.
- Oba-san: Never call her one.
- Older Than They Look
- Perky Female Minion
- Punny Name: Both version of her names are pun on the word mama and the sound cats make.
- Redemption Earns Life: Like Durahan near the very end of Season 3.
- Ridiculously Cute Critter: Mum Mew is one of the most adorable Baddies.
- Team Mom: A rare villainous example.
- Bowdlerise: Her appearance in the video game Monster Rancher 2 has her attire dominatrix-themed, all of them are removed in the anime version.
- Dark Chick
- Fairy Sexy
- Opera Gloves
- Genki Girl: When compared to the more serious Pixie and Lilim. She gets angry a lot more easily than either.
- Perky Female Minion: In stark contrast to the more serious Pixie and Lilim.
- Redemption Earns Life: Like all of Durahan's followers at the very end of Season 3.
- Shock and Awe: Like Pixie, she can conjure lightning.
- Slapstick Knows No Gender: Often on the receiving end of comic violence.
- Vain Sorceress: Proud of her looks and her magic.
- You Gotta Have Blue Hair: She has blue hair.
- Woman in Black
- Zettai Ryouiki
Voiced by Ryō Naitō (Japanese), Matt Smith (English)A trainer who cruelly abuses his giant Worm by repeatedly whipping and terrifying it. This bites him hard during "Eternal Worm".
- The Atoner: The death of his Worm in episode 4 turned him against Moo.
- I Fight for the Strongest Side: Originally joins Moo's forces, until they backstab him.
- Spell My Name with an "S": Alternately spelled as Allan or Alan.
- Tsurime Eyes: With small pupils.
- Whip It Good: Uses a whip to attack and berate his Worm.
- You Gotta Have Blue Hair: Has silver hair.
MonolA mysterious monster that appears to be a simple black slab. Remembers the history of the world, and relates this to the Searchers after they unlock him. Has a tendency to randomly fall asleep.
- Apocalyptic Log: A living one.
- The Faceless: While Monols can make faces in-game, this one does not.
- Mr. Exposition: He often tells the Searchers past events, providing the backstory of Muu and the Phoenix. Justified that all the events happened so long ago that to Holly and everyone else that it is myth and legend.
- The Monolith: To further the Shout-Out to the movie 2001, Monol's debut episode has the searchers find his disk in the desert. Later, all the characters are facing the slab outside similar to the "apes discovering the Monolith" scene.
- Sleepy Head
FalconA powerful red Dragon with a deep grudge against Moo.
Captain HornA Suezo/Tiger hybrid who brazenly defies Moo by continuing to sail with his crew of Rockies (all Suezo/Golem types).
- Abhorrent Admirer: To Holly.
- Frothy Mugs of Water: In the English dub, raided a town for its supply of milkshakes.
- No Fair Cheating: During the Old Maid game he played with Suezo in order for The Searchers to gain passage on his ship. He notices the cards reflections off Suezo's eye and gains the advantage up till the last hand. Suezo finds out at the last minute and forces him to pick the last cards with them face down. He chooses the old maid then had Suezo do the guessing game himself. Suezo's about to pick the correct card but Horn licks the ink off it to prevent him from winning. Hare however, knowing a thing about cheating, sees through it easily and shows the Searchers, forcing Horn to concede.
- Pirates: Though they don't do much pirating.
- Pirates Who Don't Do Anything
ColtAdventurer Archaeologist: She explores the various ruins of the world along with her pet toucan, Joy.
- Adventurer Archaeologist: Explores ancient ruins.
- Continuity Cameo: Colt acts as the player's assistant in MR2, along with Joy, who handles most direct interaction with your monster.
- Plucky Girl: A bit more tomboyish than Holly.
- Polly Wants a Microphone: Joy sometimes commentates on what's going on.
BakuA Big Friendly Dog who lost his owner to Moo's forces. The subject of a tear-jerking episode.
- Big Friendly Dog: Loves his owner, and Genki, who looks like him.
- Doomed Hometown: Lost it and his owners to Chariot.
- Heroic Sacrifice: Does this to save Genki from Chariot.
- Undying Loyalty: Towards Genki and his village.
Fairy HareA Hare/Pixie hybrid and one of Hare's long lost friends who was separated from him during their raid against the Baddies. After survived, she came across a group of orphaned children and helped raise them at the church since then.
- Action Girl: She's sweet but never underestimate her skills.
- Action Mom: She is an adoptive mother of the children and monsters.
- Freudian Trio: The Super Ego
- New Old Flame: Subverted. Despite Genki's teasing, she and Hare are only close friend. Wild Hare however, believes in this.
Wild HareA Hare/Worm hybrid and another of Hare's long lost friends. They reunite after the Searchers rescued him from a battle with some baddies which was actually staged as he's one of the baddies.
- Face-Heel Turn
- Freudian Trio: The Id.
- Green-Eyed Monster: He always believes that Hare and Fairy Hare are in love with each other and out of jealousy, betrayed them and joined with the Baddies.
PoritokaThe second-strongest Monster in the Season 3 Tournament Arc, Poritoka is a White Suezo who is perhaps the biggest jerk in the series—selfish, arrogant, callous, and a bully. He has an incredibly strong spinning move.
MostThe strongest Monster in the Season 3 Tournament Arc. Most is a White Mocchi and is hailed as a warrior/superhero. He acts on his own mysterious reasons, and tends to have a calm, stoic demeanor.
- Story-Breaker Power: Where was this guy when Moo was rampaging? Who knows.