From Bulbapedia, the community-driven Pokémon encyclopedia.
Otori Mountain (Japanese: オオトリ山 Mt. Ōtori) is an anime-exclusive location in Kalos that was featured in The Legend of the Ninja Hero! and A Festival of Decisions!. It served as the base for a group of ninjas led by Kagetomo.
After kidnapping Hanzo, Kagetomo, Heidayu, and their ninja army fled to Otori Mountain where Kagetomo announced his plans of attempting to succeed Hanzo as the chief of the Ninja Village instead of Ippei. While Ash, his friends, Shinobu, and the ninjas of the village took on Kagetomo's ninja army, Ippei and Saizo went to Otori Mountain to rescue Hanzo. Arriving there, Ippei had a battle with Kagetomo and emerged victorious. Ash's group met up with Ippei and Saizo after they defeated the ninja army.
In other languages