I've never seen the kids show "Ben10" but it seems like a fun enough program. I think the premise is that a kid finds a alien wristband thing that lets him turn into 10 different alien forms, each with it's own special ability. I'm guessing he uses the power to fight other aliens, or maybe an evil organization like team Rocket?
This is one of his forms EchoEcho, actually I guess it's his super form. Probably once they ran out of toys to make for the show each character got an super form so that there would be more toys to sell.