Genshō Ryūdōin

Gensho Ryudoin was introduced in a filler arc. Gensho and his two brothers, Rokkaku and Jako.

Filler Arc
Gensho and his brothers were seeking revenge on Might Guy for their father's humiliation and death. He used Wooden Men Body Transfer Manipulation Technique to force Guy to fight to the death with Rock Lee. Guy realized he was fighting Lee and Gensho's plan failed. He was then taken to the medical corps.

Naruto: Path of the Ninja 2
Gensho also made an appearance in Naruto: Path of the Ninja 2 video game. In the video game he is trying to conquer the world using the Spirit Beast. With the Spirit Beast's evil spirits he would force friends to fight against friends. In the end, Rokkaku is killed, Gensho kills Jako by using Explosion: Disappearance Killing Technique, and Naruto defeats Gensho after he combines with the newly resurrected Spirt Beast. He also is able to use techniques such as the Monstrous Illusion: Crazed Battle Illusion Technique, which causes purple rays of infinite pain, draining all power from enemies. He can use Kinjutsu as well: Release: Spirit Beast Reincarnation Resurrection Technique and Evil Illusion: Fighting Spirit Madness Technique. Due to having a radically different moveset from the Gensho in the anime, it can be presumed this Gensho is a different Gensho despite having a similar appearance.