Bugsy joins Falkner and Chuck in guarding Morty's gym while Morty uses his powers to locate the missing Lance for Gold. When Arceus appears, Bugsy is knocked out when Arceus attacks the gym. Gold, seeing Bugsy's body, picks him up and takes Bugsy with him as he chases Arceus.
When Bugsy stirs, he identifies the image Morty gave Gold as part of the Ruins of Alph. They chase Arceus there and find Lance. Bugsy stays with the exhausted Lance when Gold goes out to confront Arceus.