The customize options are awarded as players earn skull points through exceptional gameplay in the following areas:

* Beat count
* Number of kills
* Stage clear time
* Art Points
* Jackpots

Get a high enough score in each of the five categories to earn skull points which will accumulate. Accumulate enough and the various options (called 'features' in the US version) will be unlocked on the stage statistics screen.

Alternately, beat the game on Kick Ass difficulty to unlock all the customizable options.

Note: Customized options cannot be active if you want to unlock other features in the game.
Unlock Extras
Unlock alternate and secret costumes, the sound test, stage select, movie viewer, and enemy rush by clearing the game with all three characters on any difficulty.