Tondemo Senshi Muteking

Linn Youki, a 12-year-old boy, supported his father who claimed Earth would be invaded by aliens. This prediction was met with ridicule, but Linn became personally involved when he met Takoro, a young deputy sheriff from another world. Takoro was tracking notorious space criminals, the Kurodako Brothers, who sought to dominate Earth using advanced alien technology and shape-shifting abilities. With Takoro's help, Linn became the superhero Muteking, stopping the Brothers' schemes and otherworldly antics.