a.k.a. Konjiki no Gash Bell!!, or Konjiki no Gash!!A manga created by Makoto Raiku. This series is a very unusual take on the Mon genre, in that the "mons" of this series are for the most part, super powered children with a human "owner". One hundred demon children (mamono in the original Japanese, called "mamodo" in the English release) are sent to earth to do battle with each other to find out who will be the next generation's King of Demons. The catch is that they can only use their demon powers if they find a human to read spells out of their book. If their book is burned, they're banished back to the demon world and are out of the contest.The show specifically features the adventures of the arrogant Japanese junior high school student, Kiyomaro Takamine (shortened to "Kiyo" in the English release), and his hyperactive mamono partner, Gash Bell (renamed "Zatch"). Together they decide to try to make Gash the Demon King, so he can rule over the demon world with kindness.The series ran for 33 volumes and was adapted into a 150 episode anime.
This series provides examples of:
Accidental Misnaming: Ponygon's real name is Schneider... not that any of the other characters can understand him when he tries to articulate that. Funnily enough, In Animal Land, where the human characters can presumably understand him, he is called Ponygon, and he's fine with it so it may be his actual name in that manga.
All Your Powers Combined: Zatch's golden spellbook contains the strongest spells of most mamodo in the fight, for Kiyo to use freely. This is used to defeat Clear Note at the end of the manga.
Another example comes from The first Movie, with the 101st book. Used by Wiseman in a ploy to get himself in the battle for king, it STEALS spells from other books and uses them as its own. Ironically, something like this would have been useful against Clear Note as it was made as a precaution to stop crazed king candidates, but you know how movies and canon work out together. Anyway, his scheme was neutralized when Gash, Tio, Kanchomé, and Umagon were able to unify their powers into one spell, which burned the book.
When he and Kiyo first meet, the manga flat out tells us there's no language barrier between them.
Well, Kiyo's main allies are all well-educated/well-traveled, and it's not impossible that they'd be able to speak multiple languages, or at least be speaking English some of the time. Also something to remember is that Kiyo himself is a genius so much so that he was able to teach himself how to read the language of the demon world and reprogram a computer enough to make it virtually unhackable in less than an hour, so its not a stretch to say that he knows more than one language.
Anyone Can Die: That is, having your book burnt and returning to the mamodo world, which frequently happened even to sympathetic characters.
Thanks to the nature of the central conflict, we learn very early on that this is going to happen to EVERY demon child character in the series, except one. Naturally, every demon child is competing to be that one. It's an unusually dark setup when you consider how light-hearted the series usually is.
Wonrei and Kido are probably the best examples.
And towards the end of the manga once the battle comes down to the final ten, Zatch's friends (who've pretty much been there since the start) begin to get picked off one by one until Zatch, Brago and Clear Note are the only ones left.
Anti-Climax: The revelation of Arth's final spell. It had been hinted at for an arc without actually showing up, with Arth finally using it in his battle against Gorm. He casts it, and hundreds upon hundreds of BFS's rain from the sky. You'd think Gorm would be screwed, right? Nope. He promptly pulls out his ultimate spell, which summons as many black holes as Arth has swords, and the black holes suck up the swords like nothing. Arth doesn't last long after this.
Arguably Zofis' defeat to the perspective of the main heroes. After recovering from fighting Demolt, they go to where Zofis is...and he's already been defeated and tied up by Sherry and Brago. Averted in the anime, which puts the rest of the characters closer to the action.
Anti-Villain : Barring a few exceptions, most demons Zatch and his friends fight are not truly evil, and several express regret for their actions.
Apologetic Attacker: Kolulu and Lori are forced to fight Zatch and Kiyo when Kolulu transforms into her brainwashed form, and tries to stop the attack.
Armor-Piercing Question: "What kind of King do you strive to become?", from Gustav to Bari. This, together with Zatch's own goal of "Becoming a Kind King" make Bari rethink his way of fighting and define his own goal of "Becoming a Strong King".
Art Shift: When ever someone is playing the Only Sane Man or the Straight Man they get drawn in a very blocky style. Kiyo will sometimes go entire chapters with this face in front of the astounding weirdness of this series.
Attack Reflector: Spells like Rashield and Giga La Seoshi can actually reflect the opponent's attacks.
Doctor Riddles and Kido also apply. The first doubles as a Badass Grandpa, the second is a little glasses-wearing demon full of curiosity who can shoot giant-sized rocket punches.
Badass Normal: Sherry is more badass than most males, has a cool weapon and generally kicks more ass than more or less every other human in the series.
Well, her name is Sherry Belmont. Hell, she even has a whip.
Parco Folgore also applies, especially when he protects Goomu and Mir from receiving a major punch from Kanchome after he goes [[Mad With Power with Shin Poruku. He appears so absurdly muscular in this scene that it's possible that Kanchome's mind is working against him here to unconsciously make Folgore look cooler and stronger than he actually is]].
Nearly all the recurring book masters apply. As targeting a demon book directly is, perhaps, the most common tactics in this manga and, moreover, villains are generally fine with torching masters alongside with books, all human good guys need to be able to dodge death beams and survive being thrown around by explosions. Besides those mentioned above, worthy of special mention are Dufort and Apollo, whose abilities are precognition in all but name, as well as Gensou, who decided to accept his book because he found human martial artists too boring.
Bait-and-Switch Boss: Leo, defeated by Zeno. Subverted in that he badly beats Zatch and Kiyo before he goes. Also somewhat in the Millenium Mamodo arc where Brago and Sherry fight Zofis while the rest of the good guys fight Demolt, who is kept a secret up until the first time we see him.
Back from the Dead - In the manga Kiyo after Leo beat the living shit of him while he was preparing the most powerful attack, Zatch in despair resurrected him, accidentally.
Batman Grabs a Gun: The heroes are fighting Zeon's co-dragons in an attempt to stop Faudo, a giant demon who towers over small mountain ranges. Things are not going well they are getting defeated one by one when Umagon desperately starts raising the heat in the area with his flame spells. The villains are confused at first, since there isn't enough heat to burn the Demon's book, which would take him out of the fight, then we get the truth: Umagon isn't trying to burn the demon's book, he is trying to boil the demon's human partner alive.
Beware the Nice Ones: Don't piss off Zatch, you will regret that. Or for that matter Kiyo. You know what; especially Kiyo.
Kanchome is cowardly and childish, BUT FOR THE LOVE OF GOD DON'T PUSH HIM TO THE EDGE!
Rein, despite his intimidating appearance, is easily one of the nicest mamodo. Of course, once his friends and especially his book keeper are threatened, he shows he gives new meaning to the phrase "scary strong".
BFG: Cherish's rifle spell,and her Shin Level spell has mini-drones that support fire.
BFS: Arth's upper tier Spells,and his Shin Level spell is RAINING BFS's
Big Eater: Most of the mamodo LOVE yellowtail fish, and actively search for them, and eat them whole.
Big Bad: Each of the three major story arcs have one: Zofis in the Ancient Mamodo arc, Zeno in the Faudo arc, and Clear Note in the King Festival arc.
The anime has the Big Bad Duumvirate of Grisor and Dr. Hakase in the Demon Mirror arc, Maestro in the In-between World arc, and Wiseman in The Movie.
Bittersweet Ending: Gash becomes the demon king, but has to go back to the mamodo world. Worse, their two worlds will be closed off from each other for another 1000 years, so it's likely that Gash, Kiyomaro, and all the other teams will never see each other again (made worse by the fact that Gash will likely outlive Kiyomaro
However, there is also the fact that Kiyo learns that Suzy and all of his friends were sent to different schools, implying that probably they are never going to see each other again. Not to mention that Zatch is busy being a king, which gives him little time to hang out with his friends.
Blood Knight: Bari starts out like this, but eventually gains ambition beyond simply beating people up after his encounter with Gash. Also, Kolulu's second personality (see below).
Brago begins as this as well. Plus, a bunch of lesser characters qualify too.
After he devours his own spellbook, Demolt is one full stop.
Boring, but Practical: Rare profession example. When Kiyomaro's class is asked what they want to do when they grow up, they all give strange responses, but the last one says he wants to be a salaryman. Most of the students chide him for the lack of imagination, but the teacher actually praises him. He then goes on to explain there is nothing wrong with a job like that. He explains that aiming to become a celebrity, athlete or performer are wonderful jobs to dream about, he asks them what is there to do after the time in the limelight and the stability of their lifestyle. You can read the whole thing starting here: http://www.mangareader.net/266-25411-15/zatch-bell/chapter-276.html
Bowdlerize: Zatch is given boxers in the English dub while he had nothing under his cloak in the original.
He actually does wear boxers under his cloak in the Japanese version of both the anime and manga, but the English version of the first manga chapter ends up showing Gash putting boxers on over ANOTHER pair of boxers. Meanwhile, the dub of the first episode cuts out a scene of Kiyo accidentally getting a close look Zatch's naked crotch before screaming and falling over in shock.
Folgore's song about breasts, "Chichi wo Moge". (this was also changed in the US manga, for whatever reason)
Everything about Big Boin and her "Boin Chop". Strangely, when Kido and Zatch do it is not censored.
Viz tends to do this whenever they have an anime adaptation, so they try to make the edits emulate what happens in the animation. Never mind the fact that one of the characters insults Kiyomaro by calling him "Piyomaru" in the English dub, even though he's called "Kiyo" in that dub.
Brainwashed and Crazy: Because of her pacifistic nature, Kolulu was saddled with a second, MUCH more violent personality that manifested whenever her spells were cast in order to ensure her participation in the battle for kingship. However, she is the only demon who appears to have undergone this treatment, despite there being a few more demons (Rein comes to mind, as well as Momon in his first appearance) who have no interest in fighting, even for the side of good.
There's also Koko, who turned sadistic and mean-spirited under the influence of Zofis.
During the Faudo arc, Zeno gives his henchmen power through the use of the Godufa spell. It not only makes them more powerful but also makes them eviler and obedient to Zeno (as several of them were planning to betray Leo once he awakened Faudo). Rodeaux is such a baddass that he can withstand this, however.
Breath Weapon: There's a subset of Mamodo who have these. For example, Zatch's most basic spell, Zaker, shoots lightning from his mouth.
Later subverted with Cherish for Ted, due of the fact that Cherish was being manipulated by Leo, and later by Zeno.
Cain and Abel: Zatch and Zeno. In the childhood friend variety, Sherry and Koko.
Calling Your Attacks: Played with somewhat: Attacks ARE called, but the people that do the calling AREN'T the ones that perform the attacks. Not to mention that the attacks could not be performed unless they're called.
Came Back Strong: Kiyo dies or comes very close to it in Faudo, and when he reawakens his heart power is massively increased and he gained the answer talker ability along with multiple spells.
Canon Foreigner: Eido, Shion Hibiki and Nya, Grisor and Dr. Hakase, Maestro, and Wiseman among others.
Canon Immigrant: The wind Mamodo, Hyde, who Zatch fought in filler segments at the very beginning of the anime, appears multiple times in the end of the manga.
Captain Ersatz: Some of the Majestic Twelve are based on American superheroes; Lightning Eye is clearly based on Cyclops of the X-Men, while Rocket Foot is obviously inspired by the Flash.
Cartesian Karma: Tacitly averted with Koko who was sadistically brainwashed, but is later rescued by Sherry and restored back to her original, innocent state. It's a good thing she's not a wanted criminal now or anything and can happily go to college too, especially after (publicly) razing most of her town and kidnapping dozens of people in order to make them do terrible things. It would have to be inferred that her savior Sherry has some pretty good connections.
Catch Phrase: Sunbeam: "Grooooooooooovy!", Victoream: "Very Melon!" and "Very shit!" (only in the original version, of course)
Character Development: There are lots, especially for the demons, though Kiyo has the most of all. Special mentions goes for Kanchome, Brago, and last but not least, Zatch.
One can track Zatch's growth via his eyes.
Significant growth is what lets demons gain new spells.
Characterization Marches On: Sure, Kane just grew out of his bully phase, but the sadistic way in which he behaved in the first story is so radically different from how he is for the rest of the series that it really feels like this trope at work.
Chekhov's Gun: Done wonderfully with Zatch's memory which Zeno stole from him after nearly killing Zatch in the beginning of the tournament. During the showdown at Faudo some of memories of Zatch leak and gets to Zeno's making him to see how wrong he was about his hate towards Zatch and after his defeat the entire thing gets to him while he's dreaming and definitely makes him regret everything he had done to Zatch.
Chekhov's Gunman: If a character fights any of the main characters and doesn't have their book burned, expect them to show up roughly a hundred chapters later and either help out the heroes or work for the villain. Except for Baransha. She's just a douche.
Cool Old Guy: Jed, Gustav, Doctor Riddles, and a great example, though he's easily forgettable: Alvin, Byonko's partner.
Covered with Scars: Bari's look for his last appearance in the manga, courtesy of Elzador, a prodigy of the Dragon Clan
Crouching Moron, Hidden Badass: Several characters qualify, but Byonko practically embodies this trope. He spent nearly 50 chapters playing the role of Butt Monkey, but the instant his spells finally come into play, he starts smacking around one of the strongest demons in the series to great effect. His partner (mentioned two tropes ago) would also qualify.
Kanchome. Just Kanchome.
And Folgore. Good god, Folgore.
You could say this happens with Momon, but he isn't really "hiding" his badassery, he gains it after going through character development. This happens with a lot of the Mamodo, except Purio.
Holy crap about anyone who fights Zeno ends up in this.
The very first time Zatch and Brago "fought", that being in quotes because they stood no chance against Brago.
After Kiyo's return, Zatch vs. Rodeux. And how.
Dark and Troubled Past: Suprisingly, Folgore. Before he turned into the cheerful and famous Italian pop star, he used to be a violent delinquent in his hometown. His behavior was so frightening that it turned him into a complete outcast and even led to his own parents getting afraid of him and threatening him at gunpoint to leave town.
Though we don't get much information, Mir's heavily scarred back and intense submissiveness to a stronger power have some seriously unfortunate implications regarding the nature of her servitude to Clear Note. It's actually so bad she has no qualms with attempting to kill Elly with Goomu's Diaborosu Za Randamito, when she is all of six or seven years old and has a serious medical condition. She is also implied to have had connections with the mafia in the past.
Death Is Cheap: Kiyo dies during the fight in Faudo. It takes about 40 chapters for him to start fighting again, and he even gets powered up for the experience. Then again 40 chapters is a rather large cost.
Demon Head: Kiyo. This reached epic heights during his Unstoppable Rage against Rodeux in the manga. AND THE ONLY ONE ABLE TO MAKE ZENO TERRIFIED (At least for a few seconds though). Dufort even broke a sweat. (To see this, go to Say My Name)
Determinator: So very many. Includes the ENTIRE main cast, a lot of the side characters, most of the villains, and more than a few one-shot characters. It'd be quicker to list every single person in the story who DIDN'T fall into this category.
What interesting is despite this trope, victory not always certain. Though at the very least the characters are left alive to fight another day.
Also Grisor from the demon mirror filler arc, though possibly more justified since he lacked the strength to actually fight back when cornered.
The Ditz: Suzy. Just to give an example, when she was a kid, she was trying to lead a lost little girl home, only to be distracted by a kitten trapped in a box floating in the river. The two of them ended up several miles away from where they wanted to go.
The Dog Bites Back: A cook, who was one of the people kidnapped by Steng and Baltro spent an entire chapter being treated like crap. Then he helps Zatch and Kiyo find weakpoints to Baltro, and distracts Steng by repeatedly throwing rocks at his head to help Zatch and Kiyo defeat him.
In the magic mirror filler arc of the anime, Shion. She literally gets kicked again for her efforts, but still succeeded in what she set out to do.
The Dragon: Demolt to Zofis. Almost literally, since he has a rather draconian appearance and is outright stated to be stronger than Zofis.
Foreshadowing: The Faudo arc establishes two things that become extremely significant in the final arc.
First, the true nature of Bao Zakeruga establishes that spells can have their own sentience and can influence their masters. Clear Note is increasingly controlled by his strongest spell, and is eventually outright possessed by it.
Second, Cherish's fight with Zeno shows that the spirits of mamodo can materialize and influence the human world when the souls of the children she looked out for helped her overcome her Fear of Thunder. Zatch's golden book applies this principle to the other king candidates to gain an edge against Clear Note.
For Massive Damage: Shin level spells. They are so powerful that using them more often than not hurts the mamodo.
Four Is Death: Out of all of the Mamodo that Zofis revived from a thousand years ago, the last four are the most powerful.
Also, Zatch's fourth spell is Bao Zakeruga, which is a major plot point in the series.
Freudian Excuse: Why does Zeno hate Zatch? He believed that Zatch was the favorite child, since he received the power of Bao, and Zeno had to go through Training from Hell.
Gentle Giant: Shin. His first appearance includes not only helping Zatch get off the swing sets he's trapped on, he helps and old lady cross the street, sorts the recycling bin, and is nursing an injured bird back to health. Unfortunately, being the gentle giant, his past involves the gigantic kid being bullied back in elementary school, and his mother's dying wish was for him to be able to stick up for himself. Naturally, the poor guy has to have a douchebag mamodo who uses his reverence for his mother to try and get him to do things like attack a school. He's a little bit of The Woobie as well.
Rein both subverts this trope and plays it straight at the same time. He used to be a complete savage in the past, and in the present he's got an intimidating and sometimes downright scary appearance, and he's also very powerful when battling. However, he's also very friendly, kind, gentle, and doesn't even want to fight if he doesn't have to.
Getting Crap Past the Radar: Lori's backstory involving neglecting parents is... interesting. The way she feels adopting Kolulu is the only way to fill the hole in her heart is shockingly similar to some teen pregnancy stories, if you replace adopting Kolulu with giving birth.
Suzy's oranges that have faces on them have sometimes cracked open, and the blast of orange juice looks like somebody's head just opened.
A good deal of stuff Suzy does with her fruits count, actually.
Good Bad Translation: The Mad Scientist in the Mamodo Mirror filler arc was named Professor Fusaichi Ichiro in the original version, and was usually referred to as simply "Professor", or "Hakase." The US dubbers apparently mistook "Hakase" for the character's name, so he's called Dr. Hakase in the dub. So essentially, he's named "Doctor Professor."
Good Old Fisticuffs: Danny, Wonrei and Ted fights mostly with their own hands. All done in an awesome way.
Gosh Hornet: Zatch helps Kiyo and his classmate during a bug hunt... by dropping a beehive on them. Running quickly ensues.
Folgore gives us the occasional Italian in both original and dub.
Hard Work Hardly Works: Subverted, Zeno achieved his power through rigorous training and is one of the most powerful demons. Just to sum up he beat the living shit of Leo, even after his Dangerous Forbidden Technique which was supposed to increase his power by ten times. Funnily enough, Leo worked really hard to please his family by releasing Faudo and winning the battle, and he fails at this so he's a great example of this trope.
Heel-Face Turn: Byonko, Penny, and Goomu. They didn't last long. Rodeaux turns against his master, and some consider this a Heel Face Turn but he was likely just doing it because he wanted to, and would likely have still killed the good guys in a second if he had the opportunity and the power.
Koko also gets one at the end of the Ancient Mamodo arc, though that's more because of her Laser-Guided Amnesia that sets her back to how she was before Zofis gave her a Face-Heel Turn.
Heroic Sacrifice: Not the death kind, but moreover letting the books burn to save someone. Gets especially frequent during the Clear Note arc.
In the manga, when Zatch fought with Leo, Kiyo lets all of Leo's spells hit him and actually dies trying to ensure Leo's defeat to save Japan while protecting Zatch's book. His last thought is for Zatch to become king with his new partner.
I Let Gwen Stacy Die: Lori's partner Kolulu gets her book burned due to being Brainwashed and Crazy, and gives Zatch the idea of becoming a kind king, whereas he and Kiyo were simply fighting for their right to stay together before. Whenever Zatch reaffirms his purpose, a brief flashback to that scene is likely not far behind (in the anime, at least).
Image Song: The duets were to be expected, and some of the side characters get their share.
Insufferable Genius: Played with - Kiyo starts out despising his intellectual inferiors (read: everybody) and the feeling's mutual. On the other hand, his unpopularity actually seems to bother him a lot and it might be a chicken-and-the-egg situation because they were jealous.
Involuntary Battle to the Death: The entire mamodo battle becomes this for some of the more peaceful mamodo. Certain mamodo who are unlikely to want to use their spells at all are given evil alternate personalities that love fighting.
Jerk with a Heart of Gold: Parco Folgore, a Handsome Lech pop star who spends most of his time chasing after bambinas. Oh, and he's also really devoted to his patheticaly underpowered demon partner, Kanchome.
Also Kiyo, who doesn't appear to have any redeeming qualities when we first see him and still has some real jerkass moments.
Naomi could count as well. Even if she tortures Zatch whenever they meet, there are still instances where she not as bad as she seems (i.e. Saving Zatch on one occasion and cleaning the playground when it's left a mess.) Also in the bonus comic in volume 33 it's revealed she's in love with Zatch.
Kangaroo Court: Referenced by name in the episode where Zatch is sick.
Karma Houdini: Nearly every villain either changes sides or gets their comeuppance eventually, with the notable exception of Roberto Vile, Zofis's Evil Genius, who runs away in terror upon his demon being defeated and the heroes decide not to pursue him for some reason. One could say he already recieved his comeuppance, but given what he was planning to do with the moon stone's power if Zofis became king, it's strange that they didn't send him to jail.
Keet: Just look at that image and say that doesn't 100% apply to Zatch.
Large Ham: Victoream. From his uber-serious voice (courtesy of the king of all scenery-chewing in anime) to his constant showboating to a song-and-dance number about how much he enjoyed eating a melon, he's tremendously entertaining and a little hard to take seriously until he starts shooting huge, V-shaped lasers at you. Folgore and Keith are also examples.
Laser-Guided Amnesia: Zeno steals all of Zatch's memories shortly before Zatch is found by Kiyo's father. While Zatch regains his limited memories of Earth when he revisits the spot where they were stolen, the rest of them have to be returned by Zeno after the latter's redemption.
Koko receives this after Zofis's defeat.
Light Is Not Good: Zeno, ** Clear Note (and then some. The dude's spellbook is see-through).
Mind-Control Eyes: Used more often as a Facefault than to actually show that someone is mind controlled, although Koko also has these eyes. Clear Note's also has these when we first see him, presumably because he is extremely sure of himself and has barely had a hard time in the entire mamodo battle. When he gets serious, they disappear and never return.
Mirror Boss: A non-Videogame example. When Zatch fights Zeno, being from the same family, they possess the Lighning element and some same spells, and their book owners Kiyo and Dufort both have the Answer-Talker ability, but both Zeno and Dufort have a nasty advantage against them due to years of intense training. In any Zatch Bell video game Zeno is pretty much a recolored and revoiced Zatch.
More Dakka: The Ganzu-type spells involve firing gatling-gun-like pojectiles of the user's element.
Most Common Superpower: Now, either Big Boing's tremendous breasts are a parody of this trend in American comics, or it's just because she's Foreign Fanservice and meant to be stereotypically American.
Never Say "Die": Justified; demons who lose the battle are returned to the demon world instead of killed. It is implied that they can die in certain circumstances, but since this is an idealistic show, that never happens.
Late Manga Spoilers: Somewhat subverted later in the manga, when it's revealed that the entire population of the demon world, including those who were sent back in the battle essentially are dead. They've been reduced to a spirit form until the winner is crowned, upon which the king can choose to either revive whoever they'd like, or instead remove them from existence.
Not So Harmless Villains: Purio and Zoboron turned out to be a genuine threat when working in tandem, despite being seriously goofy no matter how you look at it.
This happens with Purio and Rodeux much later, though Rodeux is more than threatening on his own.
Ironically, when you take a look at Purio's spells, you realize just how much potential he had. His spells mainly consist of ways to incapacitate the opponent, namely slippery liquid, sticky liquid, paralyzing liquid, a potent itching powder, a very tough net, and a smokescreen they used for quick escapes. His single offensive attacks? He spits freaking acid! With that set of powers, he could have easily been a front runner in the battle, but the immaturity and goofyness of both him and his book owner cause them to be a weak team on their lonesome.
Panty Shot: Suzy's skirt lifts up when Zatch uses Zaker for a second time in Episode 1.
Happens a couple of times with Tia and Penny too, for comedic purposes of course. Though in Tia's case, the constant skirt-flipping actually made her discover the Chaajiru Saifodon spell.
Personality Powers: Spells are intimately tied to Character Development, so it was fairly obvious; brash and outgoing Zatch has lightning, Small Name, Big Ego wannabe Kanchome has illusion powers, and so on. Taken to an extreme with pervert Momon, who has a moveset entirely based on skirt-flipping and running away. There's also Tia, who gets mostly healing and defensive spells, which is her true nature. However, she also has a spell that makes it quite clear that pressing her Berserk Button is a VERY BAD IDEA.
Pet the Dog: Surprisingly Rodeux, of all people, when he met Cheeta.
Plucky Girl: Shion Hibiki becomes this by the end of the Demon Mirror arc.
Power of Friendship: In spades, going above and beyond usual Mon fare. Desire to help/protect/save their friends serves as the main motivation for most of the good guys (except for one or two pairs that implied or just about outright stated to have romantic relationships) and inevitably gives them Heroic Willpower to go on. The Golden Book power seems to be given to Zatch because the other mamodo all agree to help him, which is in essence an example of this trope.
Sitcom Arch-Nemesis: Naomi, the little girl who always picks on Zatch. It's so bad that when Raidou playing an electronic game in an omake chapter, Zatch's strongest spell, Bao Zakeruga, had NO EFFECT on her.
Small Girl, Big Gun: Cherish. It's shown towards the end that if she had stayed in the tournament longer, her Shin-level spell would have been an even bigger gun.
Small Name, Big Ego: Victoreem. Oh, sure, he's strong, and everything, but no amount of ability could possibly back up that ego.
There's also Kanchome. And Keith. And Mars. And Fein. And Eshros. And... hell, anyone Zatch fought in the first episodes.
Robnos takes if pretty far, too, constantly insisting that he has the upper hand and even calling himself invincible.
Not So Stoic: She starts to show emotions After Zatch convinces her that she can trust him and in his friends, and when her partner Albert shows that he deeply cares about her, even when mind controlled.
Super Mode: Zatch's Rauzaruk spell increases his physical abilities.
Super Strength: Most of the mamodo in the battle are gifted with this.
Talking to Himself: The dub was cancelled before the Faudo arc, so this is averted for Zatch and Zeno.
There Can Be Only One: Only one gets to be king. Cooperation is gained through promises of power, admiration, or making sure that the only people in the finals are the ones that share your vision.
Tomato Surprise: Zeno's relationship to Zatch is kept hidden until near the end of the third story arc.
Took a Level in Badass: Sherry was pretty badass to begin with, but she was still human (which showed on long journeys with Brago when she got tired and occasionally passed out from exhaustion). But right around the time Zofis's castle was being attacked, she started displaying very impressive abilities, such as dodging high-level attacks on her own. So it's more like she already had levels in Badass and then took a few more.
There's also Folgore and Kanchome, who take steady steps towards Badass status in the course of the story. A highlight are the chapters focused on them, where Kanchome stands to protect a little girl from a Bowser-sized dragon demon. The thing is, he's pissing himself with fear, and is very aware he's asking for an asskicking, but he simply is determined in protecting that girl and "making her smile again". You gotta admit that's a pretty big change from the full-coward and selfish Kanchome he was in his first appearances.
Unstoppable Rage: After having his ass handed to him by Kiyo, Rodeux makes the mistake of berating Kiyo's fallen and incapacitated friends. Kiyo proceeds to hammer Rodeux's defenseless body with spell after spell in a manner that comes uncomfortably close to torture, stopping only to upgrade his Demon Head into progressively more inhuman forms. Amazingly, Rodeux actually survives this.
There's also Tia's Chajiru Saifodon spell, which is literally fueled with Unstoppable Rage. The spell is otherwise useless, making it double as Awesome, but Impractical.
The Unfavorite: Zeno feels he was one turns out he was wrong. Their parents loved them both equally.
Verbal Tic: Zatch comes to end almost all his sentences with "na(ru) no da?" (isn't it so?). He also uses the phrase "Unu!" to express approval, which Zeno later reveals to be a symbol of his knowledge of his relationship to the current King.
What Kind of Lame Power Is Heart, Anyway?: Some of the mamodo get stuck with lame powers. Until late in the series, Kanchome's abilities revolve around transforming for various purposes, but are rarely useful in battle. Purio has the power of snot, which is only mildly useful. Momon has what Kiyo calls "running away powers", which involve running away.
Heart Is an Awesome Power: Later in the series, these mamodo discover useful ways to use their powers. Kanchome, in particular, becomes possibly the strongest mamodo in the series, while Momon holds off two evil mamodo with relative ease.
A more notable example is used in the final arc: while training the main characters to improve themselves so they can combat Clear Note, Dufort explains to Folgore that Kanchome has the potential to be the most powerful mamodo in the group. However, if Kanchome doesn't have control of his abilities, bad things are going to happen. Turns out Dufort was right: During his fight with Goomu, the power of his Shin Poruku spell goes to Kanchome's head, turning him into an overpowered monster that shows no regret when cruelly beating Goomu and his bookpartner Mir (thankfully Folgore convinces him what he's doing his wrong before he can do any permanent damage.
Yandere: Penny quickly turns into this after finally meeting up with Zatch.