Play VS mode in Boss Stage
At the VS Mode Selection Screen, press L2, L1, Square, Up
Play VS Mode in 2nd Boss Stage
At the VS Mode Selection Screen, press L2, L1, Square, Down.
Level Select
At the title screen, press L2, L1, Triangle, Up
Infinite S.Skill
Right, Down, Left, Up, Triangle, Select, Left, Right, X
Increase Homing Missiles
Right, Down, Left, Up, Triangle, Select, R1, R2, X