[Androzani84]

Technically, God Zenon was the name of the robot. The actual combination with Gridman was Thunder Gridman.

Anyway, onto the references.

Ghoulgilas coming back as a Mecha version is similar to what the og show did with a few of its monsters in mid season, sticking armour on them to become Mecha versions (the exceptions being Anoglilas, who was reused as a fake version and Shinobilar, who was at first straight up reused, before being painted red and given a nunchuck in his third appearance to become Kung Fu Shinobilar). Syber Squad either acknowledged them as upgrades, or treated them as separate monsters.

While, as stated, the combinations was based on Thunder Gridman, the name Full Power Gridman has been used before for an official combination wherein he combines with all 5 Assist Vehicles (which comes out as Thunder Gridman riding the King Jet and wielding the Dragon Cannon). It only appeared in the post show photo novels and in the boys invent great hero short’s take on the battle with Khan Digifer.