When The Vindicators assembled for a second time, it was to defeat Doom-Nomitron. Rick Sanchez and Morty Smith were not invited due to Rick's personality conflicting with the rest of their team. Lady Katana, Diablo Verde and Calypso were killed fighting against Doom-Nomitron.
He hid out on Dorian 5 and used his shape-shifting powers to disguise himself as an inhabitant of the planet. Because of this, The Vindicators decided to exterminate the whole planet to make sure they killed Doom-Nomitron. This became a great shame for The Vindicators who preferred not to talk about it. It did get brought up again during Rick's second "Saw"-like trial. It was stated by Rick that if he was there they could have avoided the planets destruction.