Arimammoth is an ant/mammoth hybrid monster of Shocker and an antagonist in D-Video Special: Kamen Rider 4.
Nothing much is known about this hybrid, but he did appeared during the third loop assisting General Black and Cheetahkatatsumuri fighting against Kamen Rider Drive, who had egged the inhumanoids to attack him. But when Go and Kiriko heard the commotion, Arimammoth began charging up an energy attack and fired it at Go, but Shinnosuke takes the blow for Go as Type Speed.
Now during the final loop he was battling Kamen Rider Zeronos, but Arimammoth was impaled by Zeronos' ZeroGasher Sabre Mode and destroyed when it's Full Charge attack was loaded.
- Being a combination of both a mammoth and an ant is just the ironic part is their sizes.
- Both Arimammoth and Cheetahkatsumuri are the only Gel-Shocker members to where the Shocker Belt.