From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki

Planet Monmasu (モンマース 惑星, Monmāsu Wakusei; FUNimation "Planet Monmaasu") is a planet in the Northern Galaxy.


Dragon Ball GT

Planet Monmasu was a planet where everything was ten times the normal size. One of the Black Star Dragon Balls landed on Planet Monmasu.

Video games

Planet Monmasu is the second level in Dragon Ball GT: Transformation. Enemies encountered here are Giant Bees, Giant Spiders, a Giant Turtle, and a Giant with a Black Star Dragon Ball stuck in one tooth.