Kamen Rider Blade: Blade vs. Blade

Kamen Rider Blade: Blade vs. Blade (仮面ライダー剣（ブレイド） ブレイドVSブレイド) is a Hyper Battle Video, wherein a Trial-series cyborg pretends to be Kenzaki, who quickly discovers the fraud and fights him. During their battle, the other Riders bicker humorously about which Blade is the fake, which constantly results in their attacking the real Kenzaki. As with all Hyper Battle Videos, this serves as a device to exposit the Rider's various powers and abilities.

Summary
The special starts with Kotarou writing his book chronicling the tales of the Kamen Rider. Kenzaki walks in and then leaves and just as soon, another Kenzaki enters, which is revealed to be Trial E in disguise of Kenzaki. Something is different about this Kenzaki though, he clones the Blade belt and card just as Kotarou notices that this isn't the real Kenzaki. This leads to a battle where the two fellow human riders must decide which rider is the clone and which is the real Blade. This is followed in by humorous moments in which Tachibana mistakes one of Kenzaki's traits to be that of the clone, then shooting him in the rear with the Garren Rouze, as well as Mutsuki hitting Kenzaki over the head with the Leangle Rouze. In the end, Hajime arrives and uses some smart thinking to find out who the real Kenzaki. This allowed Mutsuki and Tachibana to give Kenzaki their trump cards to defeat his opponent as both Jack-Form and King-Form.

Trivia

 * The fake Kenzaki wears a scarf, even in Rider form, something that has not been seen since Kamen Rider ZX. In Showa Kamen Rider Series, doppelganger riders were distinguishable by having scarves that were a different color from the real rider.