This is the evolution of the Natural Fake Grox, just called “Fake Grox.”
The clothing items added share the names of the Grox parts, but do not look like them. Then again, while the Grox parts exist in the base Spore game, players are not supposed to access them.
I came up with lore for these. They used to be something different, but once they learned of the Grox, they turned to worshiping them to survive.
They went as far as modifying their genes in an attempt to look like them, but they could not figure out how to get the Grox cyborg implants or the unique, nameless philosophy the Grox have (fans have nicknamed it “Groxology” or “Groxism” but they are the only ones that can have it without mods or hacks, as neither the player nor randomly generated empires can have it).