Planet Blobule
Planet Blobule is the setting of Chapter 4-2 in Super Paper Mario. The planet is the point from which the Outer Limits may be accessed. When the player first lands on the planet, Squirps will need to go to the bathroom. Shortly after, they'll find an outhouse, but it's occupied. The one in the outhouse requests some toilet paper, otherwise they won't come out. After searching the planet, Mario and friends come across the elder of the planet's Blobule inhabitants. For ten Coins, he'll give them a piece of paper with a clue on how to continue on it. After bringing the paper to the outhouse, Fleep the Pixl will join the party.
Blobule is a small planet that is mostly barren, though some plant life is seen. The main inhabitants of Blobule are the similarly named Blobules.