Spoilers for Doom Eternal: The Ancient Gods follows
I think it’s funny seeing some reactions to this saying that Sephiroth would beat Doom Slayer. Doom Slayer. The man who went and killed every demon on Mars, into hell itself to kill every demon there, teleport onto earth as the last line of defense, blows a hole in Mars just to fight more demons, finds out the Kahn Maykr is trying to resurrect the Icon of Sin, goes to heaven to kick her ass, Icon gets resurrected anyways, goes back to earth and kicks ITS ass, and after that he gets bored, fights more demons so that he can resurrect The Dark Lord which is basically Satan himself so that he can kick HIS ass, and the Slayer is so bad ass that The Dark Lord (which is the embodiment of the demons and humans biggest fears I might add) is ACTUALLY The Demonic Interpretation of the Slayer himself, and I’m sure in part 2 he goes and kicks The Dark Lords ass.
So, yeah. If there’s any character with the possibility in Smash that could kick Sephiroth’s ass it’s Isabelle’s Best Friend.