Jungle Japes

Jungle Japes is the first level in the game Donkey Kong 64.

Since this is the first adventure stage of game, its where the player learns to do many things, including collecting bananas and transforming into Rambi. It is located in Donkey Kong Island, and requires one Golden Banana (found near the entrance itself) to enter. Diddy Kong is held captive here in a mountain prison.

Trivia
There is a stage called Jungle Japes in Super Smash Bros. Melee and Super Smash Bros. Brawl.