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Playstation 2 - Pac-Man World Rally cheats

Unlock Nightmare mode:
Finish each cup in hard mode with a gold trophy.

Unlock The Prince as playable character from Katamari Damacy:
Win 1st place on the circuit races and rally in easy mode to play 
as The Prince. 

Unlock Pooka as playable character from Dig Dug: 
Win 1st place on the circuit races and rally in normal mode to play 
as Pooka.

Unlock Fygar as playable character from Dig Dug: 
Win 1st place on the circuit races and rally in hard mode to play 
as Fygar.

Unlock Courses
Earn the indicated Gold medals to unlock new courses:
Unlock Easy Watermelon Cup - Earn a Gold thropy in Cherry Cup and Grapy Cup 
Unlock Easy Rally Cup - Earn a Gold thropy in Easy Classic Cup 
Unlock Easy Classic Cup - Earn a Gold thropy in Easy Watermelon Cup 

Unlockable Weapons/Items:
Eat the indicated amount of ghosts in each cup to unlock more weapons/items

Unlock Black Bomb upgrade for Green bomb:
Eat minimum five blue ghosts in Pac-Mobile mode.

Unlock Siria (Ice Dragon) Weapon:
Eat minimum eight ghosts in the Grape Cup. 

Unlock Sir Pac-A-Lot: 
Eat minimum ten ghosts in the Watermelon Cup. 

Unlock Galaga Ship:
Eat minimum twelve ghosts in the Classic Cup.