Comets
To unlock a comet you have to beat each level under a specific time limit
Completion bonuses
Set the system date to just before midnight on December 31 When midnight passes a message from the King of All Cosmos will appear
Control credits
After completing the game and the credits begin you can control the Katamari in the background to roll up items
Eternal level 1
Finish Make the Moon then make another moon and turn it into star dust
Eternal Stages
Eternal 1 Build up the ball past 1m30cm before the time runs out in Make a Star 4
Eternal 2 Build up the ball past 25m before the time runs out in Make a Star 8
Eternal 3 Build up the ball past 800m before the time runs out in Make the Moon
Happy New Years Message
Set your PS2s date to just before midnight on December 31 After midnight passes you will receive a message from the King of All Cosmos
Hidden cousin
Once all levels have been completed replay the past levels Somewhere on each map you will be able to pick up a cousin to add to your collection Note This was found to be true on Make a Star 4 and Make a Moon at least
Hidden FMV sequence
After completing the Make A Moon level replay it and create a larger Katamari Replace your old Moon with this to view a new FMV sequence
Hidden movie
After completing the moon do the stage again and make the moon into stardust This gives you a movie of the little boy saying how rich people are different
Hit Your Friend With A Washing Pan
After beating your friend in Space Mushroom press triangle while the King Of All Cosmos is talking to drop washpans on their head
More Balloons on Collection Menu
When you collect at least one of every object in the game thus completing the Collection the King of All Cosmos will give his praise as well as more balloons to carry the Prince on the Collection Menu
Royal Warp
When you get pushed through the floor by a moving object such as the swing with bears on it on Make A Star 4 The King will warp you to another area of the level for your safety and give a short speech about the Royal Warp
See What the King is Saying
When you start a stage the King will say quotsending things to earthquot when he does that open the disc tray and do not close it or close it without the disc and you will hear more things the king is sending to earth They are pretty funny When you are finished just close the tray put in the game disc
Unlock Sound Test Movies
In the Make a Moon level build the
ball up over 800m