A Yiben is a very hostile alien. When they die, a baby is made in their place, the baby having all his/her old memories and thoughts. Jacoby Heidu likely killed them all, making the species extinct, or possibly endangering them.
Dowser is the leader of the Yiben Army. He normally wears a mask to shield himself from the eyes of his army. Some say he wasn't even a Yiben. Jacoby Heidu killed him with a blaster when he ambushed the Yiben Space Station.
- He is a parody of Bowser, from the Mario series
- Jacoby Heidu did prove he was a Yiben, after taking off the mask of the deceased Dowser.