Tileoid Y

The Tileoid Y is an enemy in Super Paper Mario. It is made up of many yellow tiles, hence the name. The Tileoid Y moves across the floors, walls, and ceilings, only changing direction when it bumps into the player. It is the fastest of the Tileoid family.

Tattle
That's a Tileoid Y. It is a mysterious creature that's made of many small parts...Max HP is 10 and Attack is 2. It can also crawl along walls and ceilings...Tileoids vary in color and ability. This yellow Tileoid is known for its great speed...