[[caption-width-right:180:He's gonna [[IncrediblyLamePun bonk]] you back into the Stone Age!]]

'''Bonk''', known as '''PC-Genjin''' in Japan and '''BC Kid''' in Europe, started life as a comic series in a magazine promoting Creator/HudsonSoft's UsefulNotes/PCEngine (or the UsefulNotes/TurboGrafx16, as it was sold in North America). Many people liked the comic so much, Hudson decided to make a game based off it and even made Bonk the mascot for the system. The games follow the story of a [[SuperDeformed big headed]] caveman named Bonk as he protects his land from the evil King Drool.

''Bonk's Adventure'' was released in 1990, and is one of the most well known [=TurboGrafx=] games. In the U.S. Bonk was marketed as a MascotWithAttitude against Mario, one year before Sega released SonicTheHedgehog.

It was followed by ''Bonk's Revenge'' in 1991. It was a general improvement of every aspect of the previous game.

''Bonk 3: Bonk's Big Adventure'' came out in 1993, and introduced the concept of size-changing candies that would let Bonk take multiple pathways.

The next major title of the series came on the UsefulNotes/SuperNES. Titled ''Super Bonk'' (''Chō Genjin'' in Japan, ''Super BC Kid'' in Europe), it followed Bonk's attempt to return to the past after King Drool sent him to the future.

Outside of a playable cameo in ''Saturn Bomberman'', a remake of the first game for sixth-generation consoles, and re-releases on the Wii's Virtual Console service, Bonk has yet to re-appear anytime soon. He was slated to have a new game titled ''Bonk: Brink of Extinction'', but it was unfortunately canceled when Konami bought Hudson.

It also had a spin-off CuteEmUp series called ''VideoGame/AirZonk'' (''PC Denjin'' in Japan).

This has nothing to do with the Scout's {{catchphrase}} from ''VideoGame/TeamFortress2''.
!!The Bonk series contains examples of:
* AmericanKirbyIsHardcore: The U.S. box art for the first two Bonk games. An in-game example occurs in ''Bonk's Revenge'', where a image of Bonk in the credits was altered to resemble how he looked in the U.S. artwork.
** Inverted with the 2003 remake of ''Bonk's Adventure'' [[NoExportForYou that was released in Japan.]] Bonk always has a SlasherSmile, and everything else looks less cutesy then it was in the original.
* AnachronismStew: Various enemies use cars, flying pirate ships, and mechas, mostly prominent in ''Bonk 3''. Inverted in ''Super Bonk'', which takes place in modern times with elements from the prehistoric era.
* AngryEyebrows: Bonk every time he eats meat, especially his second transformations. He looks incredibly demented in this state in ''Super Bonk''.
* BadFuture: In ''Super Bonk'', Bonk is captured in King Drool's trap and is sent to what appears to be this, with King Drool having conquered the world. Bonk has to find a way back to his own time period to SetRightWhatOnceWentWrong.
* BaldOfAwesome: Bonk, oh so much.
* BattleInTheCentreOfTheMind: In ''Super Bonk'' not only do you enter the brain of a massive dinosaur, dealing with threats and maze obstacles as they come, but you also have to fight his inner demons too.
* {{Bowdlerise}}: In the sequels, Bonk's feminine form was replaced with his angry forms from the first game.
** It wasn't removed from [[MythologyGag Bonk's idle animations]] in Super Bonk though.
* BigBad: King Drool the Third, in both series [[FridgeLogic (despite Air Zonk taking place in the future)]].
** [[spoiler:Although at the end of Super Bonk, King Drool gets sent forward into the future, so it's possible that explains his presence in the Air Zonk games]]
** Actually, the King Drool in the Zonk series is most likely a descendant of the one from the Bonk series.
* BookEnds: ''Super Bonk'' begins with Bonk falling into a trap by King Drool and being sent into the future, [[spoiler: the game also ends this way, only with King Drool in his own trap while Bonk watches him get teleported into the future.]]
* BossRush: The last level in most of the Bonk games involve fighting all of the game's previous bosses before fighting King Drool.
* BrainwashedAndCrazy: The bosses in ''Bonk's Adventure'' are in this state due to mind control eggshells on their heads.
** This applies to the [[{{Mook}} Hatchets]] too, which actually are brainwashed little dinosaurs living in Bonk's world.
* CaptainErsatz: Bonk resembles Krillin from the ''Franchise/DragonBall'' series, especially in the 2003 remake. The mobile phone game and the cancelled ''Brink of Extinction'' redesigned Bonk, primarily his eyes, to lessen the similarities.
** It's unclear if this was the case with [=BoE=] or if it was just ArtEvolution. [[http://www.youtube.com/watch?v=wWxocTEU-LI&feature=related Leaked gameplay footage]] showed the original Bonk sprite was used as a save icon, in addition to a map icon.
** Punchy Pedro from ''Bonk's Adventure'' is basically a dinosaur [[Manga/AshitaNoJoe Joe Yabuki]]. It becomes blatantly obvious when you destroy the eggshell on his head.
* ChestMonster: Some pink/red flowers (which normally award minor prizes) will become black flowers with large grins and attack Bonk when he jumps on them instead of giving him items.
* ChromaticArrangement: In ''Bonk's Adventure'', Bonk's normal form wears red, his second form wears blue, and his third form wears green.
* ContemporaryCaveman: Subverted in ''Super Bonk'', where King Drool uses a time machine to send Bonk into the future. Although he visits a city and a space station, they also have some structures made out of bone frames. This might be because the Hatchets have pretty much taken over the world.
* CoOpMultiplayer: ''Bonk 3'' and the UsefulNotes/ArcadeGame had another player play as a PaletteSwap of Bonk.
* DefaceOfTheMoon: King Drool takes over the moon and splits it in two. While Bonk liberates the half still in space, he has to retrieve the other half in ''Bonk's Revenge'' and ''Bonk 3''.
* DegradedBoss: Smaller versions of the bosses from ''Bonk's Revenge'' reappear in ''Bonk 3'' as enemies in the sixth stage.
* DenserAndWackier: ''Bonk's Adventure'' was just a simple lighthearted romp through a [[{{Prehistoria}} dinosaur land]] in order to save a princess from an evil T-Rex. ''Bonk's Revenge'' went a little further, while still keeping the setting intact, ''Bonk 3'' is where the series went completely overboard, with completely random stage design, and entire mini-stages taking [[WombLevel place inside of enemies]], the weirdness only continued in ''Super Bonk'', though this time it was actually justified, as the game was about Bonk travelling through time.
* DifficultyByRegion: In ''Super Genjin'', the Japanese version of ''Super Bonk'', if you go off the top of the screen in the space stages, you'll be sent to a "penalty game" in which you must build up speed while running around the Earth and then jump back into space. In the international versions, this was removed, and Bonk simply bounces off the top of the screen in those stages.
* DiminishingVillainThreat: King Drool started out as a rather dark and monstrous foe, but beginning with Bonk 3 he was portrayed as a smaller, more cartoony villain who relied on machines to attack Bonk.
* EvilIsBigger: The Bosses in this game are ''huge''.
* EyesAlwaysShut: "PC Enjin", Bonk's second form in ''Adventure'' and the international versions of ''III''.
* FreewareGame: The Amiga port of ''B.C. Kid'', developed by Factor 5, is available for download at the company's website. It requires an Amiga [[UsefulNotes/{{Emulation}} emulator]], however.
* GenderBender: In the Japanese releases of ''Revenge'' and ''III'', Bonk's first transformation after eating meat inverted his gender and gave him [[WhatBeautifulEyes big eyes]] and prancing movement. The U.S. and PAL releases altered this so it resembles one of the transformation levels from ''Adventure'', with ''Revenge'' using the second transformation and ''III'' using the first.
** Super Bonk 2 has Pink Meat, which not only inverts his gender with the big eyes listed above, but also gives him a ballerina dress.
* GettingCrapPastTheRadar: In ''Super Bonk'', the second half of Round 2 takes place inside a dinosaur. After going through the stomach, brain, and heart, you fight the boss in an area labeled "Blue Balls".
* GiantSpaceFleaFromNowhere: Most of the bizarre bosses in Super Bonk appear without any explanation.
* InterspeciesRomance: A weird case involving Bonk and Princess Za. The latter is a non-anthropomorphic (but cute and Bonk-sized) [[{{Squick}} plesiosaur]].
** In the 2003 remake, Princess Za has been given a complete redesign, now she's anthropomorphic and wears a royal dress. YMMV on this being an improvement or not.
* KingKoopaCopy: Bonk's nemesis King Drool is a massive, green, monstrous, TyrannosaurusRex with wings who kidnaps and brainwashes Princess Za in ''Bonk's Adventure''. He just settles for [[TakeOverTheWorld world domination]] afterwards, though.
* MisbegottenMultiplayerMode: ''Bonk III: Bonk's Big Adventure'' has co-op multiplayer that makes the game NintendoHard. Both players share the same health bar and lives, and when one person gets hit, the other does not get MercyInvincibility, which can result in players dying twice as fast. Also, while bonking another player doesn't hurt them, it does stun them, either leaving them open to an enemy or knocking them below the screen. Should a player get knocked out of view, the other player can't progress further without either going down and rejoining the off-screen player, or have the off-screen player teleport back to the other one, at the cost of some health.
* {{Mook}}: The Hatchets, small dinosaurs that wear eggshells as helmets.
* MythologyGag: In ''Super Bonk'', some of Bonk's idle animations are all of his transformations from the previous games.
* {{Notzilla}}: In ''Super Bonk'', the second stage transformation (combined with Big Candy) turns Bonk into a bizarre-looking Godzilla-esque monster.
* OddballInTheSeries: Super Genjin 2 (Super Bonk 2). The game is completely linear level structure, and there are numerous design choices that may alienate those familiar with the series: Insta-death BottomlessPits (When prior Bonk games had ''none''), ''Checkpoints'' (Where Bonk can be instantly revived upon dying in previous games, thus eliminating the need for checkpoints), and lots of Meat-based Power ups, many of which [[PowerUpLetdown aren't designed well]] or so situational they're useless outside of the point where you'll need them. You could say Super Bonk 2 was an initial concept for a ''Mario'' title, but then the developers decided to turn it into a ''Bonk'' title instead at the last moment. Needless to say, Super Bonk 2 got NoExportForYou and sent the franchise into dormancy for a while.
* OppositeSexClone: Bijin, who started out as a effeminate transformation of Bonk exclusive to Japan was later re-purposed into the female second player character for the co-operative entry in the series.
* PowerUpFood: Meat which seems to increase Bonk's rage/[[FireBreathingDiner make him irritated by the spiciness of the meat]], and candy which affects his size from the third game onwards.
** In ''Super Bonk 2'', Bonk can now consume eggs [[VideogameFlight which transforms him into a half-bird]], green glasses that turn him to a [[OverlyLongTongue a pseudo-frog]] and a shovel which gives him a [[ThisIsADrill drill]] on his head for some reason.
* PunnyName: Bonk's Japanese name, ''PC Genjin'' (which is referred to as PC Kid by Japan's [[BlindIdiotTranslation translation]]), is supposed to sound like PC Engine, the name of the system where the series began, combined with "genjin", Japanese for "caveman."
** This was played with in the ports, with his name becoming FC Genjin on the Famicom, and GB Genjin on the UsefulNotes/GameBoy.
** All of Bonk's seemingly random transformations make ''some'' sense in Japanese, as they are similar puns or cultural references, [[LostInTranslation but these names were either changed or not mentioned at all in localization, leaving some to wonder why Bonk is now a chicken.]] PC Enjin ("Ape-man" Bonk's first level of transformation from the first game), PC Henjin ("Weirdo" Bonk's second level of transformation from the first game), PC Bijin ("Beautiful Man" and Bonk's GenderBender or DistaffCounterpart depending on the game), PC Funjin ("Eruption Man", the form where Bonk spurts angry explosions from his noggin), PC Ganjin ("Rock Man", Where Bonk's head becomes a rock), PC Sakebujin ([[MakeMeWannaShout "Shout Man"]]), Golgo Genjin (as in Golgo13 - Bonk's initial transformation in Super Bonk).
* PurposelyOverpowered: After eating two pieces of meat or one huge chunk, Bonk gains brief invincibility, can do twice as much damage, and headbutting the ground damages all enemies on screen, including bosses! Would be a GameBreaker if the power-up wasn't timed, lasting only 30 seconds at best. It also gets downgraded or is lost entirely if Bonk takes damage.
* PutOnABus: Princess Za hasn't been seen in any game after ''Bonk's Revenge'', not counting the Japanese-only remake of the first game.
* QuirkyMinibossSquad: The Hatchet bosses in ''Super Bonk 2'' are this.
* RecycledSoundtrack: About 1/3 of the music in Bonk's Revenge is reused music from Bonk's Adventure.
* ReformulatedGame: The UsefulNotes/GameBoy and UsefulNotes/ArcadeGame versions of Bonk's Adventure are not ports of the original game, but are in fact completely different games with unique levels and bosses.
* SchmuckBait: Many of the red Floras (those flower things) are usually Venus Bonktraps, enemies that try to bounce on Bonk after he smacks them in their disguises. Another telltale sign is that the Bonktrap disguised as a Flora doesn't move, unlike the real ones.
* ShoutOut: Most of Bonk's transformations in ''Super Bonk'' are references to manga. "Fester Bonk" (''Golgo Genjin'') is a shout-out to Manga/Golgo13. Shoichi Yoshikawa, one of the planners for Super Bonk worked on the first Golgo 13 video game. "Kronk Bonk" (''Nyohhe Genjin'') seems to be a reference to an incredibly obscure Japanesse gag manga known as ''Unoken no Bakuhatsu Ugyā'', which starred a character named Nyohhe and featured lewd jokes and outrageous facial expressions.
* SizeShifter: Beginning with ''Bonk 3'', eating candy will either make Bonk huge or make him tiny.
** It though was quite a [[ScrappyMechanic confusing and sometimes frustrating mechanic which made the game even harder and could've made you get stuck in some parts by picking up the wrong kind of candy.]] Luckily Super Bonk fixes this by placing candy in more convenient places.
* SwallowedWhole: Recurring in the series, Bonk always ends up inside an enormous dinosaur at some point. ''Revenge'' is the only game to avert this, as it lacks any sort of Womb Level.
* UpdatedRerelease: A remake of the first game was released for the [[UsefulNotes/NintendoGameCube GameCube]] and UsefulNotes/PlayStation2 in 2003. In addition to an ArtShift, the levels are overall shorter, the bosses are completely different, [[GottaCatchThemAll and the fruit have been made collectables, in addition to the new golden wheels.]]
* UseYourHead: Bonk's primary method of attacking is via hitting enemies with his head, be it simple headbutts, head-slams or spinning in the air.
* WeWillMeetAgain: King Drool says "I'll be back!" at the end of each game, and every time he is defeated in ''Bonk 3''. It more or less become his CatchPhrase.
* WhatHappenedToTheMouse: Princess Za never appeared after the two first games, save for her appearances in ''Air Zonk''.
* WidgetSeries: It gets weirder and weirder as the series goes on.
* WithGreatPowerComesGreatInsanity: Bonk's meat-induced transformations come off as this.
* WombLevel: The series is notable for this. In ''Bonk's Adventure'', it is an entire level, while in all future games save ''Bonk's Revenge'', a (much) smaller enemy would have to swallow Bonk whole, requiring the player to escape through it's intestines.
** ''Super Bonk'' has both forms of Womb Levels, the second half of Round 2 is inside a giant T-Rex. Appropriately, it is larger than Bonk.
** ''Super Bonk 2'' perhaps has the strangest of all the Womb Levels in the series. The blue pterodactyl that eats you leads to a short bonus room with a slot machine inside it's stomach, before you exit.
* YourSizeMayVary: King Drool is about four times as big as Bonk in the first game, and slightly smaller in ''Bonk's Revenge''. In ''Bonk 3'' and ''Super Bonk'', he frequently changes size, going from the size of a fly to an incredibly gigantic form in the final boss fight in the former and being large in-game yet small in the intro and ending in the latter. In ''Super Bonk 2'', he's barely as big as Bonk himself.