Other Villains in Smash Bros.?

[Azuren]

Sephiroth, but he would require his own moveset

Akuma, easy Echo Fighter for Ryu (alongside Ken)

Eggplant Wizard, but would require his own moveset

Giovanni, but would require his own moveset (could switch between Persian, Nidoqueen, and Nidoking like Pokemon Trainer)

Bass, could be an Echo Fighter for Mega Man