Killermari

 is the Omnitrix's DNA sample of a Chimera Sui Generis from the planet Vilgaxia in Earth-1010.

Appearance
Killermari takes the appearance of an above-average Chimeran, with large muscles and a tall stature. He is a green humanoid with limbs that appear to be made of tentacle-like muscles and visible veins at his shoulders and hips. He has many long green prehensile tentacles attached to his chin. The Omnitrix symbol is on his chest.

Powers and Abilities
Killermari retains all of the abilities of his species, including their high degree of strength and durability, their sharp teeth and claws, and their ability to project powerful red beams from their eyes.

Weaknesses
Killermari seems to have boundless overconfidence in his own strength, and will take any opportunity to demonstrate this. Ben has yet to learn of this weakness, however.

Ben 10: Road Trip
Killermari was first unlocked when Ben scanned a group of bickering Chimerans in order to get them to listen to him. He then went on to make a grand speech to the previously-unlistening crowds outside, preventing the outbreak of a civil war on Vilgaxia.

Ben Prime

 * In The Shadow of Vilgax (first appearance, x2)

Trivia

 * Killermari's name is a fusion of 'killer' and 'calamari', the latter being a type of food made from squid.