Mechanical Titan Of Terror!

Imagine a monster with the enormity and strength of Godzilla®, but enhanced with rocket-propelled legs, nuclear finger missiles and a suit of indestructible steel. At first, this titan of terror wears a reptilian skin, making him indistinguishable from the real Godzilla® -- and when the two super-monsters battle, the entire world is confused by this Jurassic imposter. But when the gloves come off, so does the lizard skin, and the real threat is exposed. But who on Earth would create a destructive creature? Or perhaps, it's not from Earth at all...