|Powers and abilities|
|Abilities|| Enhanced Strength|
|Voice Actor||Dee Bradley Baker|
|First Appearance||Prisoner Number 775 is Missing|
Ultimate Wildmutt is the evolved form of Wildmutt.
Ultimate Wildmutt is significantly larger and more muscular than Wildmutt. His fur is a maroon-red color. He has four huge gray/white spikes running down his back that overlap. These spikes start out as a shark-like fin at the head and rises almost into an arc over the back, tapering near the rump. He also has a long tail whose tip has a horn, resembling a scorpion stinger. His lips are black, like Wildmutt in the original series.
Ultimate Wildmutt wears the evolved Ultimatrix symbol on his chest.
Powers and Abilities
Ultimate Wildmutt has Wildmutt's incredible sense of smell and is physically stronger than him. He also, unlike Wildmutt, has the ability to speak.
Ultimate Wildmutt has more agility than Wildmutt and in addition to his enhanced smell, he has enhanced hearing as well as a sharp tail, claws and teeth used for close range combat.
- Ultimate Wildmutt first appears in Prisoner Number 775 is Missing to defeat Prisoner 775.
- In The Ultimate Enemy: Part 2, Ultimate Wildmutt defeated the Esoterica.
Ben 10: Ultimate Alien
Naming and Translations
|Portuguese (Brazil)||Besta Suprema||From besta, beast and supremo, supreme|
|Spanish (Spain)||Ultimate Feral||From ultimate and feral, wild|
|Spanish (Hispanic America)||Bestia Suprema||From bestia, beast and suprema, supreme|
|Greek||Απόλυτο Αγριόσκυλο||From απόλυτος, ultimate and αγριόσκυλο, wildmutt|
- Ultimate Wildmutt's appearance is similar to a Fel Hound from World of Warcraft.
- Ultimate Wildmutt is one of Ben's aliens who is not in the Ultimate Alien intro; the others are Fasttrack, ChamAlien, Eatle, Jury Rigg, Shocksquatch, Clockwork and Ultimate Way Big, although this is due to their existence not being known until the second season.
- Ultimate Wildmutt is one of six aliens to have debuted as a toy before their television debut. The other five are Perk Upchuck, Eatle, Clockwork, Toepick and Astrodactyl.
- Ultimate Wildmutt did not appear in The Ultimate Sacrifice for unknown reasons.
- Ultimate Wildmutt was the last Ultimate form used in Ultimate Alien.