Cheetahkatatsumeri is a new Shocker kaijin serving as a supporting antagonist in the film Super Hero Taisen GP: Kamen Rider 3. His true identity is Genpachiro Otta of the Special Investigation Unit, who became an officer of Shocker in the altered timeline created by their History Modifying Machine.
Super Hero Taisen GP: Kamen Rider 3
In an alternate timeline created by the History Modifying Machine where Kamen Riders 1 and 2 were slain Kamen Rider 3 and Shocker achieved complete dominion over the globe, Genpachiro Otta became an officer of Shocker was remodeled as one of their cybernetic mutant monsters, Cheetahkatatsumuri.
During the final battle between Kamen Riders and Shocker, Cheetahkatatsumuri incapacitates Deadheat Mach with his slime, allowing several Shocker monsters a chance to gang up on and kill Go. Cheetahkatatsumuri is then confronted by Kamen Riders 1, 2 and 3. After being overpowered by the former Shocker cyborgs, Cheetahkatatsumuri is finished off when the three defeat him with their combined Rider Triple Kick, reverting him to his human form and revealing him to be Genpachiro.
D-Video Special: Kamen Rider 4
Cheetahkatatsumeri appears again as a member of Shocker, which continued to exist despite the timeline being reverted and recovered chunks of the History Modifying Machine to experiment with, resulting in the creation of a time loop.
During the loops, Cheetahkatatsumeri led a Shocker attack that was responded to by Kamen Riders Drive, Mach, Faiz and Zeronos. In at least one of the loops he was responsible for Go's death. During the final loop, he was slain by Kamen Rider Deadheat Mach.