Not sure how much you want, so here’s pretty much every evil deed he’s done. Cobra Commander has boxed Slowpoke tails (and complained about it), stole a Shuckle (and complained about it), complained about perceived incompetence by Team Rocket to anyone who will listen, attempted to get the Grunts to organize after Kneesocks gave him the idea to do so (for his own purposes of course), proclaimed himself ruler of the world (which ended in gigantic failure), went willingly to the base (to suit his own purposes again), and is currently attempting to kidnap Sakutaro and bring him back to base.