Sega Master System Cheats - Daffy Duck In Hollywood

Stage skip:

Press Left two times, Right two times, Left two times, Right at the main menu then start the game. Then, press 2 at the "Stage Select" screen to advance to the next set of stages.

Invincibility:

Press Left, Right two times, Left, Right, Left two times at the main menu then start the game.

View good ending:

Press Left six times, Right at the main menu then start the game.

Bad ending 1:

Press Left four times, Right two times at the main menu then start the game.

Bad ending 2:

Press Left two times, Right three times at the main menu then start the game.