About Mizuki Shigeru no Youkai Butouden

Shigeru Mizuki was not involved in production of this game. The polygon characters are inspired by Mizuki's art (2D) rather that any manga or specific characters created by Mizuki. This is allowed under Japanese copyright law. Sunakake-Babaa and Konaki-Jijii voice the characters the resemble from the GeGeGe no Kitarō anime.