You can Clearly see how awesome this Gavan toy is.

Bigfoot is larger than most of the other Mecha in the series at 3.5" tall. It is made almost entirely of metal, the exceptions being the chest, head and shoulder pads.

Grande Astro Robot is an Italian bootleg of the Clover Walker Galliar ST toy.

That's the tagline for the Godaikin series from Bandai America which started in 1982. Guardian was one of the first released to American children, and possibly the most unique. Its design is based on matryoshka (Russian nesting dolls).