Rainbow Mario is the second form Mario has access to (however is always hidden) and can be first found first in the Good Egg Galaxy. Rainbow Mario is obtained once a Rainbow Star is found. Rainbow Mario is invunerable, meaning he can't be harmed by enemies or other hazards, but will die if he falls into a Black Hole. Rainbow Mario will transform back to normal Mario once the time runs out. It also returned in Super Mario Galaxy 2 and is first found in the Sky Station Galaxy. Unlike the first game, mario will not actually become rainbow, instead remaining red while his trail is rainbow.
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