Ultimos

Ultimos is the leader of the Galactic Enforcers and the most powerful hero on planet T-K.

Powers and Abilities
Ultimos' powers are enhanced strength and durability, flight, heat vision and ice breath. He is very similar to Superman in terms of his powers, appearance and attitude.

Vilgax stole Ultimos' powers in Vengeance of Vilgax: Part 1.

Weakness
Ultimos's weakness is chocolate. It turns his skin into a brownish gray color, makes him cold, shiver and collapse, and becomes skinnier when eaten. Synaptak identified that a specific chemical, referred to as "Sucrotaxonite", in chocolate is poisonous to Ultimos and his species.

Original series
Ultimos showed up in The Galactic Enforcers to help Ben defeat Sixsix.

Alien Force
In Vengeance of Vilgax: Part 1, Ultimos lost his powers to Vilgax after he was defeated.

Ben 10

 * The Galactic Enforcers (first appearance)

Ben 10: Alien Force

 * Vengeance of Vilgax: Part 1 (first re-appearance)

Trivia

 * In Vengeance of Vilgax: Part 1, Vilgax and Psyphon called him "Ultimo".
 * Ultimos can be associated with Superman in various ways. He has enhanced strength, heat vision, enhanced breath, flight and a "kryptonite", which is a chemical in chocolate.
 * According to Derrick J. Wyatt, Ultimos is still alive.