Optimus Prime

How Optimus Prime joined the Tourney
Optimus Prime led the search for the All Spark in the Ark, a transport vessel. When they came across an abandoned solar system, they located a vessel of strangely Cybertronian design, seemingly of Decepticon make. When the vessel fled to the surface of a planet, Prime dispatched Bumblebee to investigate while he and the other Autobots battled Decepticons from the Nemesis. Prime managed to defeat Blackout, Scorponok, and Frenzy all on his own. After losing touch with Bumblebee, Prime went down to locate him on the planet, where they were attacked by Starscream and the alien ship. They fell into a cavern network, where they were further attacked by indigenous worms.

Prime Blaster (Neutral)
Optimus Prime fires a rocket from his blaster.

Prime Charge (Side)
Optimus Prime charges forward just like Wario during Wario Land 4.

Prime Flying (Up)
Allows Optimus Prime to fly for a brief period of time.

Prime Quake (Down)
Optimus Prime pounds the ground very hard, creating a shockwave.

Prime Tornado (Hyper Smash)
Optimus Prime says "Activate tornado attack!" and creates a tornado that causes massive damage.

Transform and Roll Out (Final Smash)
Optimus Prime says "Autobots!" and transforms into an eighteen-wheeler and says "Transform and roll out!" then rams into his opponents, causing a One-hit knockout if it hits.

Victory Animations

 * 1) Optimus Prime says "Autobots, transform and roll out!", then he transforms into an eighteen-wheeler and drives away.
 * 2) Optimus Prime rapidly fires three shots while on one knee, saying "Keep your heads above water!".
 * 3) Optimus Prime punches, then fires a shot from his Prime Blaster, saying "Decepticons...".

Trivia

 * Optimus Prime shares his Japanese voice actor with Kratos.
 * The rival for Optimus Prime is another robot, in this case, Sentinel from the Marvel Comics books.