Mario. 

To be fair Kirby is pretty strong in his own universe too. His move set just translates to smash bros to his advantage majorlyReal talk, Kirby is kinda a cheap character on the 64 Smash, but my go-to is Fox(when I'm not capitalizing on cheap ass Kirby)
Breh. Once u learned to play wit dude and time that fukking punch right, DK is dirty. His throw is faster than anyone else's too I believe.It's been a while since I played 64. I think I rolled with DK.