"The Invader from Space" is the 16th chapter of the Dr. Slump manga.
Summary[]
Bubibinman and Senbei
Bubibinman arrives in Penguin Village, intending to replace Suppaman as its protector. He is hit by Arale Norimaki with a barrel. He challenges Arale to weight lifting and Sumo Wrestling, and is horrified at the fact that what he thinks is a human child to be stronger than him. Shortly later, when he finds out about poop, Bubibinman tastes it and seems to like it.
Bubibinman tastes poop