Doom Dragons are a vicious species of space dragons that first appeared in "The Egg".
A female Doom Dragon first appeared in "The Egg" and was trying to eat Wander and Sylvia. Wander believed that she was a mother who had lost her egg and if they returned it to her she would become good. But they soon discovered that the egg they found was not hers and was actually the egg of a giant insect who then scared off the Doom Dragon before it could eat Wander, Sylvia and the baby.
In the episode "The Brainstorm", several Doom Dragons appeared in one of Commander Peepers' many scenarios for conquering a planet. The plan involved using Doom Dragons to attack the fortress of a planet, but would have Wander use the power of love to turn them against Peepers and Lord Hater.
In "The Epic Quest of Unfathomable Difficulty!!!", a Doom Dragon was one of the many obstacles that Wander and Sylvia had to face on their quest. Another type of blue Doom Dragon appeared which also served as an obstacle for them.
- "The Egg" (First appearance)
- "The Brainstorm" (Name revealed)
- "The Epic Quest of Unfathomable Difficulty!!!" (Cameo)
- "The Gift" (No lines)
- They are voiced by Fred Tatasciore
- In the end credits of "The Egg", this character was credited as the "Beast".