Invulnerability:
Enter Down, Down, Right, Up, Left as a code.

All Multi Player Characters:
Enter Left, Down, Left, Right, Down as a code.

Big Head Mode:
Enter Down, Up, Left, Right, Right as a code.

Dragon Warrior Outfit:
Enter Left, Down, Right, Left, Up as a code.

Infinite Chi:
Enter Down, Right, Left, Up, Down as a code.

4x Damage Multiplyer:
Enter Up, Down, Up, Right, Left as a code.

All Outfits:
Enter Right, Left, Down, Up, Right as a code.

Full upgrades:
Enter Left, Right, Down, Left, Up as a code.