We Love Katamari

Unlockables

Unlock The Memorial Option (Movie/Music Player)
Finish the game, i.e. complete the dog's solar system stage.

Unlock Second Bonus Movie
Finish the cousin collecting stage.

Unlock Staff Credits Stage
Finish the game and then talk to the girl in yellow.

Unlock Comet Stage
Finish the game and then talk to the astronaut.

Unlock Cousin Collecting Stage
Find all the cousins and then talk to the boy in yellow

Unlock Million Roses Stage
Finish the cousin-collecting stage, and then talk to the rose.