DK Jungle Climber Cheats

Cheat mode
Collect five DK coins to unlock the "Cheat" option at the "Extras" menu, with an option that allows you to resume the game with either five or twenty lives after getting a game over.

Secret Levels
Once you have the required amount of oil barrels for a world, press X to bring up Funky who will fly you to the secret level.

Little Chill 'n' Char Island: Collect all 5 oil barrels in Chill 'n' Char Island
Little Ghost Island: Collect all 5 oil barrels on Ghost Island
Little High High Island: Collect both oil barrels in Little High High Island
Little Lost Island: Collect all 5 oil barrels on Lost Island
Little Sun Sun Island: Collect all 4 oil barrels on Sun Sun Island

Extra Stages
After you beat the main story of DK Jungle Climber, you'll unlock new extra stages depending on how many banana coins you've earned.

Extra Stages in Main Menu: Beat game to open.
Stage 1 in Extra: Collect 10 banana coins.
Stage 10 in Extra: Collect 100 banana coins.
Stage 11 in Extra: Collect all 105 banana coins.
Stage 2 in Extra: Collect 20 banana coins.
Stage 3 in Extra: Collect 30 banana coins.
Stage 4 in Extra: Collect 40 banana coins.
Stage 5 in Extra: Collect 50 banana coins.
Stage 6 in Extra: Collect 60 banana coins.
Stage 7 in Extra: Collect 70 banana coins.
Stage 8 in Extra: Collect 80 banana coins.
Stage 9 in Extra: Collect 90 banana coins.