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According to Donkey Kong Country director Gregg Mayles in a discussion with Jirard Khalil (a.k.a. The Completionist), Cranky's infamous line "I did this using one life! And I took less than an hour!" during the credits was the last remnant of a scrapped mode where the player would be able to play as Cranky Kong, who would be much slower and in general perform poorly in comparison to Donkey Kong and Diddy Kong.
Contributed by game4brains
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The "Puftup" enemy from Donkey Kong Country 2: Diddy's Kong Quest was originally intended to appear in this game, and its idle animation is even found in the game's code.
Contributed by game4brains
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In the international release of the game, the title screen shows Donkey Kong and Diddy Kong swinging on a rope. In the Japanese version, it says Super Donkey Kong (the Japanese name for Donkey Kong Country) and shows Donkey Kong and Diddy Kong walking with Rambi, Squawks and Expresso with a Slippa and some Zingers following them.
Contributed by GamerBen144
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In early pre-release footage of the game, the banana-counter went up beyond just two digits, presumably up to 999. It is not known why the counter was reduced from three-digits to two-digits in the final release.
Contributed by G-Haven
At the file select menu of the game, entering Down, Down, Down, Down, A, R, B, Y, Down A, Y, then Select will take the player to a sound test menu.
Contributed by GamerBen144
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Through the use of an Action Replay code in the Super Nintendo version, it's possible to access a debug tool that makes all enemy objects lose their solidity and freeze in place. The player can use the D-pad to move around freely. Some gravity is present, but not much.
Contributed by GamerBen144
When visiting Funky Kong, a piece of music is often played which features a sound byte going "Hi-yah!" This sound byte is a sample from The System song "The Pleasure Seekers."
Contributed by RobTroid
The Japanese version is actually easier than the American or PAL versions, unlike many games of its time. The Japanese version has many more DK Barrels, and has fewer enemies.
Contributed by CosmykTheDolfyn
It was rumored that Shigeru Miyamoto disliked Donkey Kong Country. The rumor stated that Miyamoto said "Donkey Kong Country proves that players will put up with mediocre game play as long as the art is good."

Later in an interview with IGN, Miyamoto clarified that he did in fact like Donkey Kong Country, and that he worked very closely with Rare on the game.
Contributed by ThisGuyInTheSuit
In the opening intro, Cranky can be seen standing on the red girders from the original Donkey Kong playing a phonograph. The music playing is from the NES version of Donkey Kong.
Contributed by gamemaster1991
Early in development, Cranky had a much nicer personality compared to his mean spirited one he has in game.
Contributed by gamemaster1991
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The Kremlings in Donkey Kong Country were originally created for another game in development at the time, but Rareware repurposed them for DKC and they seemed to fit perfectly.
Contributed by ThisGuyInTheSuit
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On the level "Slip Slide Ride" in the Game Boy Color version of the game, you can find the RareWare cow. This cow is present in some other Rare handheld games, such as Banjo Kazooie: Grunty's Revenge and Conker's Pocket Tales
Contributed by Zoltanish
In an earlier version of Donkey Kong Country, Jungle Hijinxs was known as "Jungle Japes". The title Jungle Japes was reused as the first level of Donkey Kong 64.
Contributed by Frazzle
This game was Donkey Kong's only playable appearance in a main-series Donkey Kong game until Donkey Kong 64, despite the game's sequel and triquel games bearing the Donkey Kong Country name.
Contributed by RayMonkay
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Cranky Kong is the antagonist in the original Donkey Kong arcade and NES game. The Donkey Kong that you play as is the grandson of Cranky Kong.
Contributed by gamemaster1991
Diddy Kong was originally going to be Donkey Kong Junior. Nintendo felt that Rare's redesign was too different from the appearance of Donkey Kong Jr. and mandated that Rare either use Donkey Kong Jr.'s original appearance, or change the character's name, which Rare decided would be best. The potential names were Diet DK, DK Lite, Titchy Kong and Dinky Kong. Dinky Kong was almost the final name, but was dropped due to legal considerations.
Contributed by Bean101