The Pit Monster is a character seen in the Wander Over Yonder episode, "The Birthday Boy". This monster is a minor character in Wander Over Yonder. Pit Monster also shown for a few seconds during the song, Your Happy Birthday Song. Pit Monster also ate Lord Hater during the animatics.
- The Pit Monster is voiced by Fred Tatasciore, who also voiced the Doom Dragons that appear in the show, the Fire Lion, Snailman the mailman, Draykor the evil Dragon King, Captain Tim, and much more.