Super Robot Spirits

Play as Devil Gundam

Beat story mode with all fighters, then use Master Gundam in 64 mode and defeat Devil Gundam. Devil Gundam will now be accessible.

Play as Judecca

To play as Judecca, play the game for 300 hours.

Play as Master Gundam

To play as Master Gundam, beat Master Gundam in story mode three times and you will be able to select him in Story Mode.