Bonus sailor costumes:
Complete a level with an "S" rank to unlock another sailor costume.

Taste of Victory cinematic:
Defeat the final countdown Boss to unlock this cinematic for purchase

More Unlockables
Complete the corresponding tasks to unlock the new feature:

Cheerleader A Costume
Complete all cheerleader blocks in the Messy Park Area.

Cheerleader B Costume
Unlock Cheerleader A, then re-defeat all the cheerleaders in Messy Park.

So Long! Round Earth! Cinematic
Lose to the final countdown boss.

Play as Badtz-Maru
Complete the game with the good ending and unlock Badtz-Maru's profile. Start a new game.