Duon

Duon is a boss who is encountered late in The Subspace Emissary. He doesn't hail from any particular series and is unique to Super Smash Bros. Brawl, though he does bear a slight resemblance to Dialga and Palkia and may be a visual reference to them.

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

Role in the Subspace Emissary
After Snake, Meta Knight and Lucario kick all of the Mr. Game & Watches off of the Halberd's bridge, they dissolve into Shadow Bugs, which form into Duon. Duon is a large robot with two upper bodies protruding from his base. One of these bodies has a blade for a head, while the other has a laser. When one head takes damage, it turns 180 degrees and presents his other head. He is fought by Snake, Lucario, Fox, Sheik, Peach, and Falco he is basically a complete stage, Halberd Bridge. After he is defeated, he turns into Mr. Game & Watch. He is reformed by Tabuu to face the heroes in the Great Maze.

Strategies

 * It's highly recommended to continously dodge instead of shield because of the little lag between his moves.
 * While waiting for the trophy stand, one should try to stay FAR AWAY from Duon.
 * Its recommended that if you are going for the trophy, one should bring a reflector or absorber.
 * Pit can easily handle all of Duon's attacks, so he is an ideal candidate for the trophy.
 * In Boss Battles it should be handled with care because it can easily rack damage or KO.

Duon's Attacks
- Duon charges forward quickly.

- Duon spins around. Vacuums.

- Duon jumps up high and stomps on you.

- Duon turns around and switches sides.

Pink Side Only
- Duon shoots pink lasers with a 270 degree coverage.

- Duon shoots pink lasers at the ground in the front. These lasers can be reflected or absorbed.

- Duon's head glows, and then shoots three blue lasers. At higher difficulty, it will break shields, so dodging is preferable. Cannot be reflected or absorbed.

- Duon shoots four homing missiles. The missiles can be directed to hit itself.

Blue Side Only
- Duon slowly approaches, and then slashes three times when within range.

- Duon bashes his head forward.

- Duon readies his arms, then slashes vertically. Very powerful.

- Duon launches several mines in the air. These can be detroyed with projectiles such as Fox's Blaster.

Trophy Info
''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.''

Trivia

 * Duon's bodies feature the same color schemes as Palkia and Dialga.
 * Duon's bodies are also a reference to the two main antagonists in Golden sun who are Menardi (pink who uses pink like magic projectiles) and Saturos (blue, who uses sword combat like weapons)
 * Duon's name comes from the English word duo, which means two, referring to Duon's two sides.
 * The wheel at the base shows the yin and yang symbols, depicting the differences between them, one using melee weapons whereas the other uses longer range weapons. However, it appears that the white circle in the black part of the symbol is replaced by more black, perhaps indicating that the machine is pure evil.
 * Duon is deemed by many as the hardest Boss Battles Boss because of its incredibly damaging attacks and their very high knockback as well as the difficulty to avoid them.


 * Even on intense difficulty a trophy stand rarely appears so apart from meta ridley Duon's trophy is very hard to grab.