Unlock Characters
Complete the following tasks to unlock the corresponding character.

Unlock Devil Kazuya:
In Galaga mode complete 8 stages.

Unlock Heihachi:
Beat every character without using any 'Continues'.

Unlock Sub-Bosses:
Using ALL the characters geat the game once.

Continue In Galaga Mode:
When you've seen the number of ships you've hit on the screen press the 'Select' button and you will hear a confirmation sound indicating that you will be able to replay that stage.