Legend Rider Chronicle

Legend Rider Chronicle was a Gashat game which was created by Kamen Rider Genm.

Appearing before numerous Kamen Riders (Gaim, Kiva, Den-O, Kabuto, Decade, Wizard and Ghost) after they had finished fighting their familiar foes, Genm, taking advantage of Gaim confusing him for Ex-Aid, used the Gashacon Bugvisor to absorb the Riders' data, weakening them.

Using the Riders' data, Genm could summon whatever past enemy they had faced including a talking Shika Inves. The monsters that Genm had recreated fought the past Riders again and were able to fight on par with them due to the new Gashat. Eventually, Genm was confronted by Ex-Aid. Genm revealed that his plan was to turn people into Riders and have them fight the past monsters while ruling over them as a god. Genm and his monsters defeated all the legendary Riders present, taking the data of Riders from Ghost to Gaim and Drive. Ex-Aid attempted to fight Genm by himself but was defeated due to the upgraded monsters on Genm's side. However, Ex-Aid used the power of the Kamen Riders' followers to power up and summon back all the Riders that been defeated. United, all the past Kamen Riders fought with Ex-Aid to defeat the monsters before turning their attention to Gemn. The legendary Kamen Riders all transfered their Rider power into Ex-Aid, allowing him to perform a Rider Kick against Genm, who had only one bar of health left on his Rider Gauge. As a result, Genm seemingly perished, though he insisted he was eternal.

Behind the scenes
Legend Rider Chronicle appears in a Kamen Rider Ex-Aid stage show.