From Bulbapedia, the community-driven Pokémon encyclopedia.
Hanzo (Japanese: ハンゾー Hanzō) is a recurring character who first appeared in The Legend of the Ninja Hero!. He is the village elder and is often seen next to Shinobu.
Prior to his debut, Hanzo criticized Kagetomo due to his excessive thirst of power and self-assertion, following which the latter trained rigorously in exile to seek revenge.
Hanzo first appeared welcoming Sanpei, Ash and his friends to the Ninja Village. He was later seen flirting with Shinobu when she revealed her age to Clemont and Bonnie after Bonnie proposed to Shinobu for her brother. He watched the battle between Nihei and Sanpei and advised the latter following his defeat. He was then seen shining a shuriken accessory, to be presented to Ippei upon his declaration as the new village chief. When Kagetomo's army attacked, he was kidnapped by Kagemoto so that he could force the residents of the Ninja Village to obey him as their new chief, instead of Ippei.
In the next episode, an abducted Hanzo questioned Kagetomo's intentions, only to learn that he wished to be the new village chief. He then watched the battle between Ippei and Kagetomo, praising both Trainers for their strength, but insisting that Ippei had something in him, which Kagetomo lacked. Upon Kagetomo's defeat, he revealed it to be devotion, love, and trust in his Pokémon; and a will to fight for the villagers and their Pokémon. At the village festival held later that night, he presented Ippei with the shuriken emblem, thus crowning him as the new chief of the village. He then witnessed Kagetomo and Heidayu as they left on their journeys to be strong for the right reasons.
With the festival ceremonies over, he discussed the change in Ash's Greninja's appearance with Shinobu, Saizo, Ippei, and Nihei, excitedly remarking that the Ninja Village was saved by another remarkably different Greninja.