Invincibility
At the end of any level with an exit sign, use XY mode after you have eaten the exit sign and leave it like that. If it worked, Taz will stay frozen and the level ending music will play. In the next level, you will be invincible until you use XY mode again.
Cheat Mode
At the Sega logo screen, hold A + B on Controller One while holding B + C on Controller Two. If you did this correctly you'll hear a bark.
To use the code, pause the game while playing and press A. A menu will appear where you can restore your health and jump to any level.
