Toad

Plum Frog is a frog who first appeared in "Memories of Boom Boom Mountain." He got into a fight because Little Blue Creatures stole his plum. For revenge, he stole their triangle. When Finn fixes everything, he gets his plum back. His only line was "They swiped my plum." When everyone is celebrating at the end of the episode, he can be seen jumping onto the head of one of the Marauders.