i don't think there is! to unlock metal sonic you have to find all the emblems.
You can use an action replay card if you want
unlock codes
basic ones that are to unlock
no
1: Yes, Action Replay DS can be used on Skate it. 2: If you find an Action Replay code for "Skate it: Unlock all locations for free-skate".
no, you will not unlock anything
you cant
you must have gameshark/action replay
You can't.
you can only unlock him if you use an action replay. but if you don't then your out of luck.
No, there might be an action replay thing though... I know you can use action replay with Melee.
Not that I know of. There are things you can unlock online, and things to unlock from codes of other games, but I don't think there is anything to be unlocked from the action replay card. I hope this helps! x