Aggregor is one of the main antagonists in Super Smash Bros. Crossover. Aggregor is an Osmosian, a species that can absorb energy from other life-forms. Aggregor clashes with the heroes every now and then. Aggregor is one of the few villains watching the final battle between Naruto Uzumaki and Sasuke Uchiha during the Season 13 finale. Aggregor reappears in Season 23 to battle alongside Vilgax against Ben Tennyson and his teammates Gwen Tennyson and Kevin Levin.