Ultimos

Ultimos is the leader of the Galactic Enforcers and the most powerful hero on his planet. At this time there is very little information about him. He is the Specimen Prime. He first appears in The Galactic Enforcers.

Abilities
His primary powers are flight, superhuman strength and durability, and heat vision. He is very similar to Superman, just by his powers, appearance and attitude. He lost his powers in the Ben 10: Alien Force episode, Vengeance of Vilgax: Part 1 by Vilgax. In Ben 10,000, he seems to have gained his powers back, but it may be an alternate future.

Weakness
Ultimos' "kryptonite" is chocolate. Because it weakens and shrivels him, turns his skin to brown, makes him cold, shivering and makes him collapse, when eaten.