How would Rayman even work in Smash? His limbs aren't even attached to his body. They could make him like Rosalina but instead of Luma its his hand and feet I guess.
This is a non issue, why couldn't it work exactly like it does in Rayman's own games?
After all the characters we -have- gotten, it's disingenuous to think Sakurai can't find a moveset for someone if he really wants to.