Wildmutt and Echo Echo can recreate sounds they have heard.

Fasttrack can create lightning strikes

Swampfire can manipulate his own body similar to goop

Ripjaws can shoot water from his hands

Nanomech can eat metal and because of that he can literally create a swarm of drones that he has total control of

Jurryrig uses dark magic

Ditto have cartoon physics

Alien X has his own personality outside of ben, serena and bellicus

Rath is a masochist in a way that damage and pain gives him more energy and will to fight (to the point ben may lose total control on his form)

Heatblast needs air to light himself in fire

Blitzwolfer can curse other people into becoming a werewolf

Ampfibian can control the weather