The Dorombo Gang bumbles through a villain hierarchy with a kitchen robot that shouldn't work but does, competing against genuinely worse criminals in a tournament where losing means getting shown up by actual heroes. The premise is stupid in exactly the way late-80s anime understood: lean into it hard enough that the absurdity becomes the entire point. It's a show that knows bad guys trying to prove they're bad enough is funnier than any earnest redemption arc, and it doesn't waste time explaining why that's hilarious.
The Dorombo Gang wants to be recognized as the most evil villains of all, whatever it takes. With their Kitchen Robot in tow, they enter a madcap contest against rival teams of bad guys, each out to prove it is the nastiest around. The only thing standing in the way of these would-be super-villains is a lineup of anime superheroes, and the question is whether the Gatchaman ninja will show up in time to stop them. The two-episode OVA mixes comedy, action and mecha antics as villain battles villain in a race for infamy. Expect giant machines, silly schemes and a steady stream of gags.