No.
With action replay when hell freezes over! when hell freezes over twice and i get to skate on it, then u can play as shadow mario. It is really possible to play as Shadow Mario because my freind told me. It is Super Possible!
You can't play as him WITHOUT an Action Replay for the GameCube. But, with one, and you can.
no if you can get all this stars then you can play as luigi but not shadow Mario
you don't
No. it would be impossible for shadow Mario to be in every Mario game, because some Mario games came out before there was a shadow Mario, or even a luigi.
No
not possible.
Yes
Yes its possible to play Super Mario Land on a Gameboy Color.
Yes, Luigi is playable in Super Mario Galaxy. You unlock him after getting all 120 stars as Mario.
No,you can not.
One can play the Super Mario Flash games for free in various sites online. Two specific sites where it is possible to play the Super Mario Flash games are One Online Games and Alfy.