|Affiliations|| Galactic Enforcers|
Ben Tennyson (formerly)
|Occupation(s)|| Leader of the Galactic Enforcers|
Protector of planet T-K (formerly)
|Powers and Abilities|
|Abilities|| Enhanced Strength (formerly)|
Enhanced Durability (formerly)
Heat Vision (formerly)
Powerful Breath (formerly)
|Alias|| The Specimen Prime|
Ultimo (Vilgax and Psyphon)
|Alternate Counterparts||Ultimos (Ben 10,000 Timeline)|
|Voice Actor|| Tom Kane (Original Series)|
Jeff Bennett (Alien Force)
|First Appearance||The Galactic Enforcers|
Powers and Abilities
Vilgax stole Ultimos' powers in Vengeance of Vilgax: Part 1.
WeaknessesUltimos'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.
- The Galactic Enforcers (first appearance)
Ben 10: Alien Force
- Vengeance of Vilgax: Part 1 (first re-appearance)
- 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.