Lemon John is a character that appears in the episode "All Your Fault." He was created by Lemongrab and Lemongrab 2. He is first shown after confronting Finn & Jake, remarking that they aren't Lemon. He then reappears after Lemongrab orders him to destroy the Candy Kingdom for food, but Finn and Jake attack his heart, making him feel "feelings." He then chooses to help the Candy Kingdom and Lemongrab's Kingdom, by turning himself into lemon candy.