Toy Story 2
- While on the title screen, enter X, Circle, Square.
- When your health has depleted, quickly exit the level and return to it to become invincible.
Unlock All Levels
- At the title screen, press Up 4 times, Down twice, Up twice, and then Down three times. Once this has been completed, all of the levels will be unlocked, though you'll still have to complete each level by-and-large in sequence in order to gain the necessary Pizza Planet Tokens.