Akuma-kun

Akuma-kun (悪魔くん) is a manga series written and illustrated by Shigeru Mizuki. Several versions of the manga exist, one of which was adapted into a live-action TV show, and another into an anime television series.

There was also two movies that spawned from the TV series Akuma-kun: The Movie released in 1989 and Akuma-kun: Yōkoso Akuma Land e!! released in 1990.

Plot
The age of the demons has begun. Dr Faust has foreseen this rise of evil. Unfortunately, he is near death and is unable to personally battle this upcoming threat. Faust entrusts a young boy, Shingo Yamada, to take the responsibility of ridding the Earth of this new evil presence. Faust finds a birthmark on Shingo's forehead that signifies that he is the chosen demon fighter. Faust summons from hell what may be humanity's only hope of surviving: a less than enthusiastic devil named Mephisto rises. After signing a pact in blood to save humankind, Shingo and Mephisto set out to battle the supernatural world.