Basically, after countless cycles, a super-robot ace at the top of his game finally loses his mind and starts a multiverse chat group. Then he and a bunch of real-robot and super-robot pilots, who've become just as ridiculous under his influence or someone else's, relentlessly torment everyone else in the group.
Real-robot pilots: Do you dare defy us, when we have Photonic Power, Getter Rays, Spiral Power, G-Stones, and Eden?!
Real-robot enemies: No, no, we wouldn't dare.
This should probably be called a multi-protagonist story, since every character who appears gets their own story arc.
