Astro juggernut is a slave
So Jimmy in season 25 tells juggy that he is just an expandable pawn this to the astro.This kinda implies that he is a slave.My theory is that juggy is not a natural astro toilet and his home planet was invaded by the astro and he was the last last one of his race still alive(not counting his children) and he wanted to sacrifice himself for his children but the astro found his children and treating to kill them if juggy doesn't join them.Then later down the line he meets Jimmy the only astro that treats him like a friend and not just a puppet and that's how juggy became friends with Jimmy