Unlock Million Roses Stage
Complete the cousin-collecting stage, and then chat to the rose to play this
stage.

Unlock The Memorial Option
Finish the game (by successfully completing the dog's solar system stage). This
option includes a movie viewer and a music player.

Unlock Comet Stage
Finish the game, and then chat to the astronaut to play this stage.
Unlock Cousin Collecting Stage
Find all the cousins, and then chat to the boy with the yellow shirt to play
this stage.

Unlock Second Bonus Movie
To unlock the 2nd bonus movie, complete the cousin collecting stage.
Unlock Staff Credits Stage
Finish the game, and then chat to the girl with the yellow shirt to play this
stage again.

View Comets & Shooting Stars
After completing a standard stage with a high score, a comet will fly across the
sky, and a button will be displayed. On the Cosmos Screen (which can be accessed
by flying up into the sky from the hub screens), press the listed button to
see the comet fly across in the background.

PS2 Cheats for Katamari

Katamari cheat codes

Katamari cheats