The Subspace Emissary

The Subspace Emissary is the Adventure mode in Brawl. It tells the story of the Subspace Army, led by the Ancient Minister, and its attempt to bring the world into Subspace. The story includes most of the playable characters featured in the game and intertwines their worlds so that they meet and interact. Most levels appear to require the player to choose between one of a few characters that are available. There is also a Co-op mode that allows two players to play at the same time. Most of the enemies in the Subspace Army make their debut in Brawl, while most of the bosses have appeared in previous Nintendo titles.

Enemies
Other than Goombas, Koopas, Hammer Bros. and R.O.B. all the enemies in the Subspace Emissary are completely original and made for the game.