Unlock Water melon cup in easy mode:
     Win the Cherry Cup on the Easy difficulty level.

Unlock Water melon cup in normal mode:
     Win the Cherry Cup on the normal difficulty level.

Unlock Water melon cup in hard mode:
     Win the Cherry Cup on the hard difficulty level.

Unlock Classic Cup in easy mode:
     Win the Watermelon Cup on the easy difficulty level.

Unlock Classic Cup in normal mode:
     Win the Watermelon Cup on the normal difficulty level.

Unlock Classic Cup in hard mode:
     Win the Watermelon Cup on the hard difficulty level.

Unlock Rally Cup in easy mode:
     Win the Classic Cup on the easy difficulty level.

Unlock Rally Cup in normal mode:
     Win the Classic Cup on the normal difficulty level.

Unlock Rally Cup in hard mode:
     Win the Classic Cup on the hard difficulty level.

Unlock Nightmare mode:
     Win the Rally Cup on the Hard difficulty level.

Unlock the Black Bomb upgrade for the Green Bomb:
     Eat 5 blue ghosts in Pac-Mobile mode

Unlock The Prince from Katamari Damacy as playable character:
     Win  first place on the Rally Cup on the Easy difficulty level to
play as The Prince.

Unlock Pooka from Dig Dug as playable character:
     Win  first  place on the Rally Cup on the Normal difficulty level
to play as Pooka.

Unlock Fygar from Dig Dug as playable character:
     Win  first place on the Rally Cup on the Hard difficulty level to
play as Fyga.