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.
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~ Duon's trophy description in Super Smash Bros. Brawl.
The Duon is a major antagonist and boss fought in Super Smash Bros. Brawl's story mode, Subspace Emissary.
As the name implies, Duon is a two-sided robot on a singular set of wheels, with 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 in 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° to change his attacking strategy. The wheels it pivots on is the yin and yang symbols from Chinese-related belief, symbolizing balance and juxtaposition of two forces.
Biography
Super Smash Bros. Brawl
After Solid Snake, Lucario, and Meta Knight kick all the Mr. Game & Watches out of the Battleship Halberd's control room, they fall to the bridge and dissolve into Shadow Bugs, which materialize and form into Duon. He is fought by Snake, Lucario, Fox, Zelda, Sheik, Peach, and Falco. It is basically a complete stage, the Battleship Halberd Bridge. After being defeated by the five heroes, it dissolves into Shadow Bugs and retreat, leaving behind a trophy of Mr. Game & Watch, which Princess Peach revives and Mr. Game & Watch redeems himself, and joins the other heroes of the Subspace Emissary. It is reformed by Tabuu to face the heroes in the Great Maze, but is defeated again by the heroes, along with the other villains who were once associated with the Subspace Army, such as Bowser, Wario, Gannondorf, and King Dedede (who have joined the heroes in stopping and defeating Tabuu).
Super Smash Bros. Ultimate
Duon appears as an Advanced-level primary attack-type spirit. Its spirit battle is a Stamina battle against giant Ice Climbers (referencing Duon's name), in which shooting items picked up by the opponent have increase power. It lacks special effects upon usage.
Trivia
Duon was formed by the essence that composes the inside of Mr. Game & Watch, being a group of Shadow Bugs. According to the storyline, Mr. Game & Watch is incapable of differentiating good and evil, and Tabuu manipulates him in this way.
