Primeape has always had a serious problem with with temper. He would lose it over the simplest things, such as someone in school using his eraser without asking, or people on the sidewalk too slowly. Eventually, Primeape's rage consumed him, and he started acting very violently. He became more and more violent until he was arrested for a string of brutal attacks on the helpless. He was detained for a year until he was released. When he resurfaced, he was completely calm. He decided he wanted to move to Gijinkatown. His family, wanting the best for him, supported his decision. He moved out, unaware of the festering underworld Gijinkatown sat upon. He currently works happily as a custodian, living in a simple apartment. He has yet to encounter any problems.
Mankey is Primeape's younger sibling. She was a typical student, earning good grades, behaving normally. Then, out of the blue, she started acting violently. The only act she was caught doing was beating a fellow student for using her eraser without asking. Her parents immediately recognized this attitude and decided she should go move in with her brother, who suffered the same problem, but learned to control it completely.