Ultimo is a character from Marvel Comics that appeared in Avengers Assemble. He is a gigantic Robot used by the Leader to annihilate The Avengers. The Avengers were able to defeat Ultimo by having Hawkeye tie one end of a rope to Ultimo and shoot the other end of it on an arrow shot towards an electrical tower causing Ultimo to act like a lightning rod.
- In the comics Ultimo is thousands of years old, and he was constructed by an alien species that has since been destroyed by their own creation.
- This is his fourth TV adaptation.
- In the comics It has often been destroyed several time but has always returned.
- This incarnation does not speak.
- He appears in the episode "Building the Perfect Weapon" of Avengers Assemble.