Subspace Emissary

The Subspace Emissary is the adventure mode of Super Smash Bros. Brawl. It will feature full-motion video cutscenes and an actual story, unlike previous game modes in the series.

Plot
The Ancient Minister and his Subspace Army have arrived in the middle of a match between Mario, Peach, Kirby, and Zelda. They detonate a Subspace Bomb (by using the NES add-on, R.O.B.) that engulfs the stadium in Subspace.