Johnny Test (2005)

S5E7 Cat Scratch Johnny

Johnny and Dukey accidentally activate characters from a sci-fi film using Susan and Mary's 3-D glasses. To their shock, the extraterrestrial beings from the movie emerge into reality, setting their sights on taking over the planet. As chaos ensues, Johnny and Dukey must find a way to send the aliens back to their cinematic world before it’s too late.