Teenage Zombies: Invasion of the Alien Brain Thingys!

The Earth is under attack by a horde of Alien Brain… uh…Thingys! Humans,
succumbing to ray-guns, mind-control, and shiny flying saucers, have
failed to defend their planet and let it fall easily into the clutches
of the Big Brain and his army of Brain Thingys. The only hope left for
mankind are three Teenage Zombies that have arisen from a graveyard
disturbed in the invasion. The undead trio ignores their normal human
victims in favor of the pulsing pink brains they see EVERYWHERE - all
the while being lured to the ultimate lunch: THE BIG BRAIN! The Big
Brain soon realizes he’s overlooked this “Super Race” as they
inexplicably resist mind control, are unaffected by ray-gun wounds, and
devour his Brain Thingy Armies like sweets! He refocuses his efforts and
resources to battle the Earth’s greatest champions: The Teenage Zombies!