Donkey Kong Country 3: Dixie Kong's Double Trouble!

At the start of the game, Donkey Kong and Diddy Kong have disappeared during a fishing trip to the Northern Kremisphere, a previously unseen part of the DK Isles. Dixie Kong sets off to find the pair and is joined by her cousin Kiddy Kong. Initially, Donkey Kong and Diddy Kong appear to have been kidnapped by a mysterious robot named KAOS, but later in the game it is revealed that King K. Rool, going by the new moniker Baron K. Roolenstein, is the real mastermind behind the pair's disappearance.