Neko Majin

A short series of one-shot manga chapters by mangaka Akira Toriyama, spanning eight total installments released from 1999-2005. It is most notable for its later portion, Neko Majin Z, which is a self-parody of Dragon Ball, the author's most famous work.
The series revolves around the adventures of various characters from the "Neko Majin" race, a group of cats that can use a little bit of magic, but seem to enjoy practical jokes and martial arts even more.