The original Smash Bros characters are ...
Captain Falcon
Donkey Kong
Fozx
Jigglypuff
Link
Mario
Luigi
Ness
Pikachu
Samus
Yoshi
We're going to leave out Kirby, because he's an eldritch abomination that destroys worlds with his soft fluffy fists and does does things like punching out the very embodiment of nightmares just because somebody has taken his cake.
So, working as a team, who is the strongest, toughest, or most powerful group these guys could take down?