All Working Donkey Kong Land 3 Cheats - GameBoy

All levels complete
Press [Left]x2, [Up], [Down], [Right], [Left]x2, [Down], [Up], [Right], [Left]x2, [Up], [Down], [Right]. Open a saved game and all levels will be marked completed, with the exception of bonuses.

Unlimited lives
Press [Down]x2, [Up], [Left], [Right] at the title screen. Note: This code has no effect in time attack mode.

In-game reset
Hold [Start] + [Select] and press [A] + [B].

Time Trial mode
Collect all items in the game (Clocks, DK Coins, etc.) and defeat K-Rool in the final battle. The "Time Trial" option will be unlocked the next time the game is played.

Bonus lives
Play the "Total Recoil" level in the "Cape Codswallop" world. Collect the extra life in the bonus stage, intentionally lose the present life, and repeat.

Bonus level
Go to the Cape Codswallop - Total Rekoil level. Jump left when starting the level to find a bonus stage.

Karbine Kaos: Unlimited coins
In Great Ape Lakes, go to Karbine Kaos level. Use Kiddy to run and jump on the rat to get a Bear Coin. Press [Start] + [Select] and repeat to get unlimited coins to play Sheepy Shop mini-games.

Sea Bed Shanty: Warp barrel
There is a warp barrel in the Sea Bed Shanty level in Cape Codswallop. Move right then down and left to get Enguarde. After you get to the fourth Shark pit, swim up to the farthest pit sticking out. Directly up where the three bananas are sticking up, you will find a warp barrel that leads you to the end.