A robot with two upper bodies sharing one set of wheels. The blue-bodied half uses sword attacks, while the pink one uses lasers from his head and arms for offensive power. Whichever side is facing you will attack. Duon also threatens with homing missiles and the blade on top of the blue half.
~ Duon's trophy description in Super Smash Bros. Brawl.

Duon is a boss fought the Subspace Emissary of 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 is 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).

Super Smash Bros. Ultimate

Duon appears as a Primary Attack-type Spirit. Its Spirit Battle is a Stamina battle against giant Ice Climbers, in which shooting items picked up by the enemy have increase power.


  • Duon was formed by the essence that composes the inside of Mr. Game & 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.


            Bro Villains

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

World of Light
Crazy Hand | Dharkon | Dracula | Galeem | Galleom | Ganon | Giga Bowser | Master Hand | Marx | Rathalos

Playable Characters
Bowser | Bowser Jr. | Dark Pit | Dark Samus | Donkey Kong | Ganondorf | Incineroar | King Dedede | King K. Rool | Koopalings (Larry, Roy, Wendy, Iggy, Morton, Lemmy, Ludwig) | Meta Knight | Mewtwo | Piranha Plant | Ridley | Wario | Wolf O'Donnell

Crazy Hand | Dark Emperor | Dharkon | Dracula | Duon | Galeem | Galleom | Ganon | Giga Bowser | Marx | Master Hand | Master Core | Metal Face | Petey Piranha | Porky Minch | Rathalos | Rayquaza | Ridley | Tabuu | Yellow Devil

Assists Trophies and Poké Ball Pokémon
Andross | Arceus | Black Knight | Burrowing Snagret | Chain Chomp | Darkrai | Dark Samus | Deoxys | Devil | Entei | Elec Man | Ghirahim | Giratina | Ghosts | Gray Fox | Knuckle Joe | Klaptrap | Kyurem | Metroid | Meowth | Mimikyu | Lord Nightmare | Mother Brain | Palkia | Phosphora | Shadow the Hedgehog | Skull Kid | Starman | Waluigi | Wily Capsule

Billy Kane | Bulborbs | Carmilla | Death | Edelgard | Geese Howard | Goombas | Heihachi Mishima | Iori Yagami | Kamek | Kraid | Kritters | Majora | Nabbit | Peckish Aristocrabs | Rabbids | Rocket Grunt | Ryuji Yamazaki | Shy Guys | Slimes | Viridi | Waddle Dees | Yiga Clan

Community content is available under CC-BY-SA unless otherwise noted.