Duon is a boss who is fought late in Super Smash Bros. Brawls Subspace Emissary mode. He does not hail from any particular series and is unique to Super Smash Bros. Brawl.

Duon is a two-sided robot on one set of wheels; one half being pink and possessing a head cannon and two arm cannons, and the other half is blue with a curved blade on his head tipped in light blue. Both sides have shoulder exhaust pipes which rockets (pink side) or mines (blue side) can be fired from (as well as their arm cannons). A character who gets behind Duon can trick it into blowing itself up with its own rockets. It rotates 180 degrees to change his attack strategy. The wheels it pivots on is the yin and yang symbols from Chinese belief, symbolizing balance and juxtaposition of two forces.


The Subspace Emissary

After Solid Snake, Lucario, and Meta Knight kick all the Mr. Game & Watches out of the Halberd's control room, they fall to the bridge and dissolve into Shadow Bugs, which form into Duon. He is fought by Snake, Lucario, Fox, Zelda, Sheik, Peach, and Falco. It is basically a complete stage, Halberd Bridge. After it's defeated, it dissolves into Shadow Bugs, leaving behind a trophy of Mr. Game & Watch. It is reformed by Tabuu to face the heroes in the Great Maze, but is defeated again by the heroes, along with the other Nintendo villains (who have joined the heroes in order to stop and defeat Tabuu).


  • Duon's design and color scheme bear a striking resemblance to the two legendary Pokémon Dialga and Palkia.
  • Duon was formed by the essence that composes the inside of Mr. Game and Watch: shadow bugs. According to the storyline, Game and Watch is incapable of differentiating good and evil, and Tabuu manipulates Mr. Game and Watch in this way.
           Super Smash Bros. Villains

Subspace Army
Tabuu | Master Hand | Primids | Ganondorf | Bowser | Ancient Minister | Wario | False Peach | False Zelda | Petey Piranha | Rayquaza | Ridley | Galleom | Duon | Porky Minch/King Statue

Playable Characters
Bowser | Bowser Jr. | Dark Pit | Donkey Kong | Ganondorf | Koopalings | Meta Knight | Mewtwo | Ridley | Ryu | Wario | Wolf O'Donnell

Giga Bowser | Dark Emperor | Master Hand | Master Core | Mumkhar | Petey Piranha | Porky Minch | Ridley | Tabuu | Yellow Devil |