Kyubey
Mario
What the hell are those things coming out of his ears with the loop rings?
Creepy.
Alright, I'll go with him then. He looks really unsettling...
So a plumber that picks up mushrooms against a...small furry thing>.> Kyuubei wins due to his ability to do whatever he's good at, besides Mario is probly a human
Allow me to disagree with you guys. This animal as you mentioned can come back to life like Buu and Cell are regenerating themselves. However I believe that it can be killed permanently as Buu could be killed and Cell could be killed. I would like to vote for Mario because even in dire situations he could find a way to win.
Kyubey has many uses.