|Cool image by Zornow at Deviantart.|
Godzilla vs. Wolfman (伝説の巨獣狼男対ゴジラ - Densetsu-no Kyoju Ookami Otoko tai Gojira) was a fan film that was directed and produced by Shizuo Nakajima and several former filmmakers of Toho Studios in 1983. It stars Godzilla, as usual, doing battle against a giant Wolfman. Toho said they had nothing to do with this film or approved of this.
SciFi Japan article about the movie.