yes
It is optional
You cannot get Shadow Mario as a playable character in Mario Superstar Baseball.
Because Shadow is a Soinc charter, not Mario.
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.
Mario -luigi -Yoshi- peach --bowser-daisy-wario-waluigi-sonic-dr eggman-knuckles-tails-Amy-blaze-shadow-vector
Shadow Mario is not entirely a regular Mario series character. He wasn't really his own character. Bowser Jr. is Shadow Mario.
no if you can get all this stars then you can play as luigi but not shadow Mario
Probaly shadow Mario he's like alot stonger
Shadow Mario first appered in Super Mario Sunshine, which came after Super Mario 64, so no.
No,you can not.
No weapons: Shadow uses Chaos Control to slow down time for Mario, making it incredibly easy to kill him with a Chaos Blast. Shadow wins.Weapons: Mario uses a Star to go invincible, Shadow uses the Chaos Emeralds to go super. Tie.If they were in a boxing ring, Mario would win because he throws MUCH stronger punches than Shadow. Mario can also take a lot of hits before falling.