The Mammoth Pumpkin is a giant pumpkin which appears in all the pumpkin patches in the world on Halloween and brings candy to kids who truly believe in him.
Baltasar claims to have made him up to mess with Burke, but his big childlike belief brought the Mammoth Pumpkin to life. When the Mammoth Pumpkin learned people cut pumpkins on Halloween to make funny faces, and make pumpkin cake out of them, he got mad and started to eat all humans. He is also a rat jerk, as Kyrone threatened a yellow pumpkin in order to dissuade the Mammoth Pumpkin from eating him, causing the Mammoth Pumpkin to tell him to do it as he does not care for yellow pumpkins. He also claims that all pumpkins are rat jerks and the only difference is that he admits it. Staying true to his racist beliefs up until the very end, the Mammoth Pumpkin's last words are "Pumpkin segregation…forever…". He was defeated by a giant turkey who also came to life because of Burke's beliefs.