[[caption-width-right:256:And the [[AC: d]]e[[AC:ra]]n[[AC:g]]e[[AC:d]] font makes it a thousand times worse.]]
%% The page image is a notorious example: if you really must change it, remember to update the entries referencing it as "see above" or "see the page image" among the ones below. %%
Being a series from Nintendo, VideoGame/DonkeyKongCountry sure as hell doesn't lack the others' mood-swings from [[SugarBowl cheery and childish]] to [[NightmareFuel genuinely frightening]]. Enjoy - FromACertainPointOfView - Nintendo and Rare's use of the hardware capacities.
''VideoGame/DonkeyKong64'' [[NightmareFuel/DonkeyKong64 gets its own page]].
[[folder:Examples for Donkey Kong Country 1-3]]
* The first three ''Donkey Kong Country'' games for SNES had shockingly depressing Game Over screens. [[http://www.youtube.com/watch?v=d-U5e9LR6E4 The first one]] shows an injured Donkey Kong and Diddy Kong standing in a dark background, with a deranged wooden font and depressing music playing (as you can see from the page image), [[http://www.youtube.com/watch?v=qAPxbnL4a7E the second one]] shows Diddy and Dixie locked up while depressing music plays and the GameOver message hovers down to taunt you (with the whole screen slowly turning blood red), and finally, [[http://www.youtube.com/watch?v=o3-6g7p56lQ&feature=related the third one,]] shows Kiddy and Dixie with sad expression in a baby crib, while a [[IronicNurseryTune creepy Music Box plays depressing music]] (ButtonMashing allows you to play along) until [[LastNoteNightmare you hear someone slam a door]].
** To make things worse, the first game's game over screen DOESN'T GO AWAY until you press a button on your controller. Even when the music ends, it will stay there to haunt you forever [[spoiler: until you mash the "A" button so that you can be relieved to see the opening again.]]
** The game over screen from the [=GBC=] version [[http://www.youtube.com/watch?v=D1YPcRhZLGs can be even worse thank to color limitation]], as well as the music being changed to a [[DarkReprise quite depressing version of the Jungle Hijinxs theme]]. [[spoiler:Thank the heavens for the SNES' 16-bit processor...]]
** Thankfully, the GBA port reduces the scary factor by replacing the dark void with jungle background. But still creepy, though.
** The NES pirate of the first game has the duo in a scary reddish tint, as if they were covered in blood. The music is Funeral March of all things...
** As if the game over screens weren't horrifying enough, this [[FearlessFool person whom should be questioned for their own sanity]], decided to multiply the Nightmares by adding the G-Major effect to the [[http://www.youtube.com/watch?v=97Ig1I7hBh0 first]], [[http://www.youtube.com/watch?v=RpPYBXpqtAE second]], [[http://www.youtube.com/watch?v=Z3eVVvkmgrk third]], and the [[http://www.youtube.com/watch?v=1K3EUfNbsf0 first game on the Game Boy Color]].
** Someone thought it was a great idea to get the Game Over screen of the first game inked onto their arm as a [[http://media-cache-ec0.pinimg.com/736x/0e/cd/a1/0ecda12f8e0b0233d8ac08fb65412581.jpg tattoo]].
** The [[https://www.youtube.com/watch?v=85zufbN_qBI death music]] from the second game is pretty scary, too.
** The Game Over screen in the second game is deliberately ambiguous, depending on your interpretation of the fade-to-red: it either represents the young kongs being simply screwed, or [[MurderByCremation implies their "prison" is actually an oven.]]
** ''VideoGame/DonkeyKongCountryReturns'' continues the tradition. This time, Donkey and Diddy land in a spotlight amid pitch darkness, first expressing frustration, then hanging their heads in shame. [[http://www.youtube.com/watch?v=mUq0zOwaN_s The music]] is the same as in the original game, except it's followed immediately by dark ambience similar to a tribal funeral march.
** Someone decided to combine the [[https://www.youtube.com/watch?v=DN_KxAjRLGM GBC game over]] with the game over theme from ''Videogame/SonicCD''.
* Can't forget King K. Rool in ''Donkey Kong Country'' where after you "beat him", [[spoiler: he summons fake credits and then he gets back up to fight once more]], relying a lot on the element of surprise.
** K. Rool worsens by the end of [=DKC2=], where he is actually shown beating Donkey Kong and shooting him with his gun; he also shoots gas from his gun which either freeze, slow down, or reverse the control of your characters.
* ''Donkey Kong Land III'' - after beating the game with the normal ending (but not yet getting OneHundredPercentCompletion) attempting to enter the Lost World will result in suddenly being hit with the "You Need However Many Coins To Enter" screen, which is a digitized render of Baron K. Roolenstein against a black background while the [[SoundtrackDissonance super-happy credits music]] plays.
* [=DKC1=]'s [[http://www.youtube.com/watch?v=H0GhpHKOBEw cave music]] can make several kids want to get cave stages over with soon. Specifically, before the music hits the 1:38 mark.
** That's nothing compared to [[http://www.youtube.com/watch?v=8ofm6PARSVM Misty Menace]] and its [[http://www.youtube.com/watch?v=XyMoO0SesGk invincible zombie Kremlings]].
** The "Stop & Go Station" stage from [=DKC1=] and "Haunted Hall" from [=DKC2=], essentially acting as Nintendo's response to the [[AnimationAgeGhetto Kiddy Gaming Age Ghetto]], especially "Haunted Hall", the Kackle enemy found inside it, and its EvilLaugh. As for "Stop & Go Station", [[ItMakesSenseInContext did you ever crap your pants after seeing a green light?]]
** Let's not forget [[http://www.youtube.com/watch?v=WuF1hvF3A6c Ship Hold]] from DKC 2.
* [[https://www.youtube.com/watch?v=Ygz0iw2fD_o The snow level theme]] for the first game starts soothing and quickly becomes very suspenseful and ominous-sounding. It gives off the uneasy feeling of being actually ''trapped'' on the mountains -- or, even [[SarcasmMode better]], stalked by some ice-based EldritchAbomination....
* In the level "Rambi Rumble" in Donkey Kong Country 2, you were transformed into Rambi the Rhino and had to make your way through a level inside a Zingers' nest. Near the end of the level, you had to jump over a [[InvincibleMinorMinion red Zinger]] and fall down a short tunnel. The second your feet hit the ground, the music switched from the mellow "I'm in a Zinger nest" [[http://www.youtube.com/watch?v=0v2WJi6RHj4 music]] to [[http://www.youtube.com/watch?v=wXv2y5vrLBI&NR=1 "Run, Rambi, Run!"]] and King Zing (who was a giant, currently invincible Zinger) slowly bears down on you while you have to run away.
** Zingers in general can do it if you're horrified of bees and wasps. They aren't just your normal wasps/bees, though. They're covered in spikes, and have to be killed with either an animal helper or some kind of object ... as long as they're yellow zingers. The red zingers can't be killed with anything short of ''a barrel filled with TNT!'' This can spell doom for you in a lot of situations.
*** Not to mention their visuals are taken to more emphasized levels in the second ''Country'' game, where they are arguably more realistic looking in both sprite and artwork....have fun with nightmares of them; arguably they are less intimidating in later 3D games however since they're more cartoonish and less fuzzy.
** In the Zinger hive stages, you can see baby Zingers sitting in the honeycombs. You are also killing Zingers. These babies are watching you kill their families.
* Thorn-fearing kids had a lot of trouble with the bramble stages, which are literally covered in them; anyone else should fear the PlatformHell.
* ''[=DKC3=]'' features the "Ripsaw Rage" stage, a forest stage involving a giant ripsaw ''cutting through the level'' with creepy music (save for the GBA verion, where the soundtrack is replaced with lighter and softer tone) playing.
** [[SoundtrackDissonance Soundtrack Dissonance]] [[http://www.youtube.com/watch?v=lEoeYxWwDlg at its best.]]
** Barrel Shield Bust-Up features the same eerie BGM and those annoying Minkeys that [[InvincibleMinorMinion can't be defeated]] and keep throwing acorns at you, not to mention their voices can easily get on your nerves.
* The factory stages in ''[=DKC=]'', especially the TropeNamer for BlackoutBasement: as per the trope, you can ''barely'' see what you're doing in there.
* You don't need to be an environmentalist to be afraid of a [[http://www.mariowiki.com/Dumb_Drum sentient toxic waste drum]] with glowing red eyes. Especially when it tries to ''[[https://www.youtube.com/watch?v=KKOgyZovuPI crush you to death]]''.
* ''[=DKC2=]'' and ''[=DKL2=]'' have a castle with acid [[RiseToTheChallenge rising up to kill players]], aptly named "Toxic Tower".
* Any stage with "Hot Pursuit" playing in ''[=DKC3=]''. Everybody remembers them as the sled stages where touching ''anything'' means death.
* In the [=GBA=] remake of [=DKC2=], Rare fans may notice that when Kloak dies, he makes the same laugh as Baron Samedi from ''VideoGame/GoldenEye1997''.
* [=DKC=] example: "Millstone Mayhem" has evil Gnawties in giant stone wheels trying to run you over, with lonely-sounding ominous music playing, and the sound of the millstones' clacking.
** In Temple Tempest, said millstones actually ''chase players''.
** Even worse: if, on the off chance that you manage to find a "safe spot" out of the way of the millstones or jump over them, they will ''freeze'' and wait for you to start moving forward again.
* Kerozene in the remake of [=DKC2=]: you arrive in Stronghold Showdown expecting to simply walk out like the original, only to find a new boss named Kerozene, who is ThatOneBoss to those not expecting it.
* The really bad pirated [=NES=] [=DKC2=] which featured the game over screen from the SNES version for an ending.
* K.Rool Duel: the final boss (well, the first final boss, anyway). For starters, the overmap of the final world is a giant crocodile-shaped helicopter. Second, when you go to face him for the first time, he's [[ColdBloodedTorture torturing a tied-up Donkey Kong by pelting him with cannonballs.]] Additionally, K. Rool is now wearing pirate gear (including a [[BadassLongcoat red overcoat]]), which actually makes him look badass and menacing. Then, there's [[http://www.youtube.com/watch?v=q9_RnUZf9n4 his badass theme]] and the lack of death music, given that, as mentioned, the original death music was likely cut for being too scary due to its LastNoteNightmare (hear it [[http://www.youtube.com/watch?v=85zufbN_qBI#t=1m48sec here]], if you dare).
* ''[=DKC=] 2'' also has Kleever, a living sword wielded by a creepy red hand coming out of the lava. When hit three times, Kleever slowly falls down, only to rise back up again with nothing gripping its hilt shortly afterwards. Ever wanted to meet whoever could withstand drowning in lava while wielding a 10 foot tall sword? In the GBA port you fight Kerozene, who summons several Kleevers and breathes tons of fire.
* Krow, the first boss of ''[=DKC2=]'', is sacrificing his own young in the fight, as he uses his eggs to attack you; [[TennisBoss the same ammo must be used against him.]] The later boss fight with Kreepy Krow implies the ghost birds are the souls of the ones who died as eggs in the first fight.
* ''[=DKC3=]'''s [[http://www.youtube.com/watch?v=NnVx_6Mdsj4 underwater music]] is one of the scariest tunes in the series. It sounds like you're one breath away from drowning.
** It becomes more jarring in the level Floodlit Fish. When you hit Gleamin' Bream, a creepy sound effect accompanies the music.
** In ''DKC 2'', when you exit Glimmer's Galleon, the only level to be completely underwater (as in, there's no surface areas at all) in the main body of the stage, you get launched onto a ship deck while the [[MoodWhiplash contrastingly cheerful]] track [[https://www.youtube.com/watch?v=-rbQKmqMgEw "Snakey Chantey"]] plays, as if giving you a chance to bring yourself back into good spirits before hitting the goal target. But in ''DKC 3'', exiting a "deep sea" level takes you instead to a similarly-gloomy cave while the eerie underwater music continues to play.
* In ''[=DKC=] 2'', there's a set of Kremling enemies called Klobbers that dash at you in barrels bumping into you:
** The green ones bump you around, not even damaging you, and can even be jumped on to be thrown as weapons.
** Yellow ones cause you to drop bananas when they bump into you, more annoying and a bit startling at first, but if you don't pick them back up it isn't a huge loss.
** Red ones in TNT barrels (called Kabooms) are a bit annoying, blowing up on contact.
** The rare black Klobbers are the worst: they do the same thing as the yellow ones do... except instead of making you drop bananas, you drop ''lives''. Not even K. Rool can do more than make you lose one life at a time. It's even possible to go below ''zero lives'' with the black Klobbers.
* The [[http://www.mariowiki.com/images/e/e6/Bananabird.jpg official artwork]] of Banana Birds.
* Lockjaw and Snapjaw in the second game. If you get too close to Lockjaw, it swims really fast towards you and tries to bite you. However, Snapjaw ''follows you'' on the surface of the water, and if you so much as put one toe in it's jaw grows three times in size and it bites you.
* [=DKC2=]'s [[http://www.youtube.com/watch?v=1D95R9h7Jqw infamous Castle Crush glitch:]] a GameBreakingBug that can also wipe save files. Thankfully the glitch no longer destroys the game in the UsefulNotes/VirtualConsole re-release.
* While DummiedOut, ''[=DKC2=]'' was originally supposed to have sprites for [[http://www.unseen64.net/wp-content/uploads/2008/10/dkc2_unused_diddy.png Diddy]] [[http://www.unseen64.net/wp-content/uploads/2008/10/dkc2_unused_dixie.png and Dixie]] mourning.
** It may have been a losing stance for when a bonus challenge was lost, so [=Subverted=] to a degree.
* Take a gander at [[http://www.mariowiki.com/File:DKC2_Beta-Mr._X_Artwork.png Mr. X]] who was DummiedOut from ''[=DKC2=]''. All that is known about him is that he was the one who should hunt you down at Haunted Hall instead of Kackle. Maybe he's not any more horrifying, considering he's not withered to a skeleton, but he's right up there.
* [[http://www.youtube.com/watch?v=lhZVYuLUc7A Screech's Sprint.]] K. Rool's parrot whose race, if lost, costs players a life, and the accompanying music has a spooky moaning noise. It is also another [[SpikesOfDoom bramble]] level, thankfully the final one in the game.
** Thankfully, there's a way to avoid having to race it. You just need to have Squawks fly over it at its starting position, and you can explore the level calmly, taking time to go for the DK Coin there in and such. The thing is, you need both Kongs to do it, as you will end up hitting your head on the brambles while flying around the parrot-from-hell.
* Pretty much all of ''[=DKC2=]'' was much DarkerAndEdgier than the original. ''DKC'' was colorful and upbeat with (mostly) pleasant ambient music, while in the sequel you're all alone in a completely hostile environment where everything is against you, and the music is (with one or two exceptions) wistful at best, flat-out depressing at worst. [[JustifiedTrope Justified]], however: the first game was set in the Donkey Kong Island, the second in the Kremlings' native country.
** ''[=DKC3=]'' takes this even further at times. Although it's frequently even more upbeat and happy than the original, the more industrial, atmospheric areas and soundtracks are ''dark''. The underwater music, factory music and final boss music in particular wouldn't be out of place in a steampunk-themed horror game.
* The aforementioned "game over" screens were also used as error screens, which doubled as the anti-piracy screens: in some SNES games, a screen would show if the cartridge detected some kind of anti-piracy measure. [[https://www.youtube.com/watch?v=epENwYY4pB8 DKC 2]] simply showed you the screen with a message (deliberately interrupting your game near the end and wiping your save data, no less), but [[https://www.youtube.com/watch?v=E0bHrfPa7uo DKC 3]] brings the fright with A) the "Game Over" screen B) with the error/pirated device message C) while playing the game's boss music in a minor chord with the bass pounding in your head. More than anything else, it makes you feel like the game is watching you.
* ''[=DKC=] 2'' featured the truly terrifying Haunted Hall level - a mine cart race. Except this time, you're running FROM Kackle, the ghostly crocodile from Hell, who laughs when he catches you. Not to mention the panicking music and the TIME LIMIT!! For the latter case, there are two kinds of barrels along the path that let you handle this limit: the green plus barrel (which increase your time) and the red minus barrel (which decrease). The thing about these are two segments: in one halfway past the stage, the time limit is rather generous (over 30 seconds), but there are only minus barrels, which means too many wrong jumps... and it's over. And in the last segment, often the plus and minus barrels are nestled together, which makes it very easy for the average player to mistime and hit minus barrels by mistake, cleaving your time limit and allowing Kackle to edge... ever closer... to you.
* DKC 2's Glimmer's Galleon: The entire stage is underwater. It's also very dark, only illuminated by a cone of light from your animal buddy Glimmer.
* Another example of hydrophobia fuel: DKC 1's Poison Pond, in which [[GreenAesop the water also happens to be clouded by what is presumably the waste produced by the nearby Kremkrok Industries]]. Thankfully, the water turns out to be harmless and the Kongs' SuperNotDrowningSkills are still in effect, but the whiteness of the water is still quite unsettling.
* The Game Boy Advance port of DKC 3 adds a new boss to Razor Ridge, the Kroctopus. It's supposed to be a play on "[[XtremeKoolLetterz K]]rockodile" and "Octopus", but instead it's blob-like entity with appendages that lives in green water and has [[OffModel an art style that clashes against the rest of the game's visuals]] and goes straight into UncannyValley.
* Barbos from DKC 3 is a giant sea urchin, fought in an underwater coral area with a menacing red color scheme.
* At the end of DKC 2, [[spoiler:K. Rool falls off of Crocodile Isle and gets chewed up by piranhas, complete with sound effects, before he's later seen in the Lost World]]. The GBA version changes this [[spoiler:to him falling into the Lost World instead]], presumably because it was too horrific. The GoldenEnding is also changed too -- [[spoiler:K. Rool originally rides away from Crocodile Isle in nothing but a fit of EvilLaughter, making it somewhat of a BittersweetEnding]], but in the GBA version, [[spoiler:the extra dialogue acts as NightmareRetardant and Funky drops a bomb on him before he floats away]].
* ''DKC 3'' has the GimmickLevel Fish Food Frenzy. First, it's a deep-sea underwater level, with all the hydrophobia fuel that entails. Second, this level features Nibbla, the fish that in two previous levels attacks you if you dare to go into the water, following you. The good news: it won't attack you...initially. The bad news: You have to keep feeding Kocos (the fish enemies) to it to keep it in a good mood, because over time or if you feed Lurchins (the sea urchin enemies) its mood will deteriorate, represented by its facial expression becoming less and less happy and its color gradually changing from blue to red. If its mood hits fully red, it will then attack you!\\
It is possible to [[CuttingTheKnot skip this gimmick]] by just [[SpeedRun speeding as fast as possible to the end of the level]]; this is not advised, because if you stall you are likely going to be greeted by an angry-enough-to-attack Nibbla coming at you at high speed from off the screen.
* Normally, the Kongs have SuperNotDrowningSkills, able to stay underwater for as long as they please. However, the water in the marsh levels of ''DKC 2'' is [[SuperDrowningSkills instant-kill if either Kong gets submerged fully]], likely because [[GrimyWater it's too disgustingly polluted to be safe]].
* When you look at it a certain way, the GoldenEnding of ''DKC 2'' becomes this, in spite of the VisualEffectsOfAwesome- [[spoiler:Crocodile Isle explodes and sinks below the waves, taking with it all those awesome and beautiful levels the player made their way through and bringing about an InferredHolocaust with who knows how many casualties, and the only survivor we can see is K. Rool sailing away on a raft, uttering the same creepy laugh that Kackle made in Haunted Hall. The lack of music only makes it all the more creepy.]]
[[folder:Examples from Diddy Kong Racing]]
* While ''VideoGame/DiddyKongRacing'' seems to have a lighthearted feel, it (like any other great game by Rare and Nintendo) still wasn't free of things that frightened many young gaming children back in the day: one example is when you collect all the pieces of the Wizpig Amulet the next time you go into the main hub (after leaving one of the mini hubs on the last of the four worlds you earned it on or if you quit the game and get back on after having earned the last part of it) the statue of him lets out an EvilLaugh and then fades away. It can be seen [[http://www.youtube.com/watch?v=vZH82T3Ht4M here]]. The DS version of this game is more like a NightmareRetardant to most people, since in the DS version, Wizpig simply yawns and the camera has a lack of zooming in for menacing effect.
[[folder:Examples for Donkey Kong Country Returns]]
* It's been said that Retro Studios dedicated themselves to doing the series justice. They were right: as mentioned above, the GameOver screen has kept the [[http://www.youtube.com/watch?v=mUq0zOwaN_s original music from DKC1]], but after the twenty-second mark, it just keeps playing its sad drum beat, like a tribal funeral procession. Also, a TearJerker.
* Tidal Terror. It's got ominous music, dark clouds overhead, ambient noises, and a colossal tidal wave that swallows everything in its path and [[OneHitKill kills the Kongs in one hit]].
* Stage 4-5 in the Cave world is called "Crowded Cavern" for a reason, what with all the [[GoddamnedBats bats]] that chase after you in the cavernous dark. Their freakish screeches of terror, along with their unnatural faces, and with a few of the big bats breaking out of the floor or ceiling attempting to bite you non-stop.
** At the end of the level, you get a lovely close up of the largest bat, unconscious, with its limbs twitching, with the same demented expression.
** The music played in the world map of the Cave World. It has parts which suggest that something may be lurking in the shadows and there's a general ominous feel throughout.
* Stage 5-8 in the Forest world. "Muncher Marathon". [[PrimalFear Players afraid of spiders shouldn't even try it.]]
** If it's any consolation, the spiders are [[http://www.suppermariobroth.com/post/159475912555/in-level-5-8-of-donkey-kong-country-returns far less threatening when viewed up close.]]
* "Stormy Shore". It has the same atmosphere as the aforementioned "Tidal Terror", but instead of tidal waves, it features a vicious kraken that attacks you from the background for most of the stage.
** The kraken comes back (and is more of a menace) in ''Tropical Freeze'', where you have to swim up to avoid its tentacles and spreading black ink.
*** However, you can defeat it at the end, ending the nightmare.
* In the final boss fight, Tiki Tong transfigures all the Tikis you fight in bosses throughout the game into [[GiantHandsOfDoom huge wooden hands]]. After destroying these, they explode in a burst of light, to reveal bananas: [[AndIMustScream they've been formed into inanimate bananas, with no way to move or do anything ever again]]. The only thing they can look forward to now is getting eaten. Nevermind the unpleasantness of being turned into hands to begin with.
[[folder: Examples from Donkey Kong Country Tropical Freeze ]]
* In the aptly named "Twillight Terror" level, not only do you have giant prehistoric sharks leaping up at you, but at the end, one of these sharks is seen lying (presumably) dead at the bottom of the ocean. In a children's game.
* The new "Bramble Scramble" not only brings back thorny vines ''en masse'', this time they ''move'', as if being controlled by some sort of malevolent botanical force, and there are ''huge'' brambles in the background that coil and slither around the rocky formations.
* "Frantic Fields," which brings back the frustration and fear of "Lightning Lookout" (from ''[=DKC3=]) and has Donkey Kong get caught in a tornado.
* "Scorch 'n Torch" has you running through a brush fire as it ravages the African savannah. Special mention goes to the shrieking statues that try to topple you from the background, making a return appearance just for this level. They were small time obstacles in ''Returns'', but they more easily get in your way in this level, and the atmosphere makes them look more ghastly.
** More horrifying if you're a fan of the environment.
* "Frozen Frenzy" has you exploring the factory area from ''Returns'', but frozen over. The Factory, despite being an industrial area, was actually a very bright and cheery area in the last game. It's now much darker, rusted (the more realistic rust visuals of the Wii U make it worse), frozen, taken over by the snowmads. But what really seals it is the [[https://www.youtube.com/watch?v=0o9Zi34QJyQ music]], which begins with a menacing drumbeat and eventually segues into an offkey DarkReprise of "Fear Factory", one of the most beloved music tracks in the previous game and the series.
** In general, it's a little unsettling going across essentially the entire previous game and seeing it as a frozen, barren wasteland.
* The final level before the final boss is scary enough, but then you hear creepy laughter. You then realize said laughter is in fact the BigBad of the last game, Tiki Tong.
* "Sawmill Thrill," has you come dangerously close to being sliced by a giant buzzsaw. The urgent music really doesn't help matters.
[[folder: Examples from the CGI cartoon]]
* Because of [[SpecialEffectsFailure how poorly the animation has aged]], the characters suffer a fair share of UncannyValley moments.
* DK's description of the bog monster.
* Krusha's true colors when his brain got knocked back into place in the episode "Speed." He was a deadly and genre savvy villain, [[WouldHurtAChild willing to kill Diddy and Dixie]] with a bomb to get the crystal coconut, and without even batting an eye at the prospect of K. Rool accidentally being killed in the crossfire.
* "Speak No Evil, Dude" was probably the darkest episode of the series. The extremely deadly Kongo Bongo Gone Wrongo disease is going around, and Diddy catches it. The only cure is a single purple banana, of which there is only one. If he isn't cured, he'll ''die''. It goes FromBadToWorse when K. Rool gets the disease due to a misunderstanding, and his minions plan to blow up Kongo Bongo. DK is left with a SadisticChoice: Save his best friend and let Kongo Bongo be destroyed, or cure K. Rool so he can call off the attack. Fortunately, in the end, things turned out all right as both Diddy and K. Rool are both cured and the attack is called off, but it's still an extremely dark episode for a kid's show.
** Also, K. Rool has a stockpile of explosives big enough to destroy Kongo Bongo for some reason. In another episode ("Buried Treasure"), he seeks out a possible doomsday device. Basically, the king is deranged and corrupt enough to consider carpetbombing.