MechaGodzilla was brought to Earth by hostile aliens who planned to conquer the planet.
Godzilla vs. Mechagodzilla (1974)
Counterattack of Mechagodzilla (1975)
Besides awesome strength, MechaGodzilla, was armed with missile firing hands and laser eyes.
Of course that didn't stop Gojira from ripping off MechaGodzilla's head.
Gojira, MechaGodzilla are © Toho E-B Co., Ltd.