tails in his prime or Luigi doing absolutely nothing

out of the whole Mario vs sonic universe arguement literally the only one in the Mario universe that can beat their sonic version is Luigi
I'm sorry tails you're getting your ass kicked by Mr L

*ahem*

nine can only compare with the paradox prism, even then he's still NOT tails, if we're using versions of characters I can use dream team luigi who beat a version of bowser who absorbed the power of a stone that can literally grant wishes

also super tails from sonic 3 and knuckles too

then I can use super star luigi

true

Luigi of course