Desert Monster is a minor character in 12 Oz. Mouse. This unnamed creature is a creepy monster with fangs, that is living in a desert and only seen in "Because They Could". This monster is only seen for a little bit in the episode, but the monster is first seen roaring at Roostre and The Kid, then the Kid kills the monster with a eyeball gun, leaving only its corpse and heart out, its heart then grows bat wings and flies away.
- It can be assumed that this monster lives exclusively in the Desert, hence the name.