|Debut||"Our Journey Together"|
|Date of birth||Age 745|
Manure-Boy is a living piece of cow feces.
He, along with Poop-Boy and Bird-Poop-Boy, go on a journey through Penguin Village to find "their true home". At first, he seems to be a bully, but then joins their group. On their journey, they meet Soft-Serve Ice-Cream-Boy, who they mistook for a poop. They rescued him from the ice cream store and let him go his own way. While they lose hope, they meet Old Man Poop who tells them to find Arale's house as she knows where to put them. On their way there, they are chased by a vacuum truck, but are saved when Arale rushes out and breaks the truck. When Arale brings them to her house, she puts them in the toilet and says that it is their home. They enjoy it, but are flushed down when Poop touches the handle wondering what it does.