Anthony cheated during Pokémon battles by having several other Pokémon ride inside his Pelipper's mouth. They did not know that he had Pokémon in his mouth but were suspicious because Pelipper could use Solarbeam. He said he did not have any Pokémon in his Pelipper's mouth, and right when he said that, Bellsprout fell out of his Pelipper's mouth.
Anthony's Magby stayed in Pelipper's beak and used its attacks when called upon. Team Rocket first saw it and wondered "Why inside Pelipper's beak is red?"