Sun Sun Island
From the Super Mario Wiki
Sun Sun Island is the first world of DK: Jungle Climber.
At the beginning of the game, the Kongs are on vacation here, when Diddy Kong turns up to Donkey Kong and Cranky Kong to tell them that there is a huge Banana on top of the mountain, so Donkey Kong heads of in search of this Giant Banana. After going through the many dense jungles and caves of the island, the Kongs arrive at the summit, only to find out that King K. Rool had just left through some kind of warp. And to their shock the Giant Banana started to attack them, and they found it was not a Banana at all, but actually Xananab's space ship, which was attacking them because he thought they where Kremlings. However after the Kongs had destroyed his ship because of a misunderstanding they offered to help rebuild the ship.