Donkey Kong Land Cheat Codes for Gameboy

Game Saves
Collect the letters "K", "O", "N", and "G" all one the same level, then complete the level. The game is also saved after beating a Boss.

Unlimited Lives
Enter the bonus stage just half-way through level 8 (Gangplank Galleon). Collect the extra life and leave the stage. Re-enter the stage to collect another extra life. Repeat this procedure to collect an unlimited amount of lives.