Kamen Rider Agito
Fateful Showdown (1x22)
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Seeing Aki Sakaki dead in the hands of Agito, Ryo Ashihara mistakenly believes he killed her and attacks Agito as Gills. Agito, Gills, and G3 have a heated battle resulting in the G3 system being damaged far beyond repair.
After the battle the police department say that the new G3 system, G3-X, will have to compete against Toru Hojo's new system, the V1 system, to see what suit will be used against the Unknowns in the future