Kid vs. Kat

Kid vs. Kat is an animated television series made from Canada and was broadcast in America on Disney XD. The show revolved around Coop - a young boy in constant battle with his little sister's Sphinx cat which, in reality and unbeknownst to everyone beside Coop and his best friend Dennis, is a cybernetic alien.

Hypnokat (Season 1, Episode 6)
Kat uses his new toy mouse to hypnotize cats around the neighborhood and build an army for himself.

Flea Brains (Season 2, Episode 2)
Kat's swarm of flea-sized mind control robots hop into the ears of the people of Bootsville and soon they all destroy Coop.