Mole-Stache

"Mole-Stache? This is quite unprecedented!" - Mole-Stache in Breakpoint

Mole-Stache is one of the many aliens that Blukic and Driba accidentally unlocked in the Ben 10: Omniverse episode Outbreak. He appeared briefly talking about how lame this species was, with one of the specie's member named Jerry feeling insulted. He was first properly used in Breakpoint where Ben finds out about his mustache shape-shifting powers and successfully beat Fistrick. He was voiced by Yuri Lowenthal in Outbreak, before being replaced by David Kaye for the rest of the series. Mole-Stache was originally intended to appear in No Honor Among Bros, with his lines even being recorded, but was cut for time. He speaks like a stereotypical gentleman with an English accent.

Ball Weevil

"There must be more to this alien than the power of cuteness" - Ball Weevil in Of Predators and Prey: Part 1

Ball Weevil. His species comes from the same planet as The Worst's species. He is voiced by Bumper Robinson, who also does the voice of Rook Blonko. 

Appearance

Ball Weevil is a small yellow insect-like alien with four thin legs. He has a brown underbelly and a small beak that opens sideways when he speaks. Ball Weevil has large black eyes with green pupils and an even antenna with two spikes on top The Omnitrix is located on his green collar with two white stripes.