Following Shocker's numerous failures to defeat Kamen Riders Ichigo and Nigo, the Great Leader of Shocker decided the organization needed to be completely restructured from the ground up.
He secretly met with Geldam executive General Black from to discuss the merging of their two organizations. The two eventually initiated the merger after the death of Shocker commander Ambassador Hell.
Believing that most of the other members of Shocker were unfit to join the new organization, the Great Leader of Gel-Shocker and Black sent the Geldam kaijin Ganikomol to exterminate the remaining Shocker Combatmen so they could be replaced with stronger Gel-Shocker Combatmen.
Ganikomol was later encountered and defeated by Kamen Rider 1, though this did nothing to prevent the merger of Shocker and Geldam. Fo rthe rest of the plot see Gel-Shocker.