The Birth of Arale
Main article: Volume 1: The Birth of Arale
He first appears in Here Comes Arale! in Midori Yamabuki's class on Arale's first day of school amazed from watching Arale operating on a dead frog and during P.E. class.
In the Dragon Ball series, he appears in the 7th episode of the second half of the anime adaptation known as Dragon Ball Z where he is seen in a monster cafe in other world. It is assumed he is not dead and may possibly be a resident or staff member due to him not having a halo over his head.