SSBU: Caged
Four smashers are trapped in a high tech training facility to be used as deadly weapons against the other smashers. It's up to them to escape the grasp of the evil people holding them captive
SSBU: Intergalactic Crimes
Sephiroth has been imprisoned in an intergalactic prison for powerful figures who are too dangerous to be let free. Sephiroth, who was never evil enough to destroy anything tries to escape but fails. The whole of the smash team goes on an adventure to save him.
SSBU: The End
The power source in the center of the mansion which keeps the Smashverse stable is at risk of dying. This will cause the entire Smashverse to collapse and all the smashers will perish. They will have to do everything they can to save the universe.