Kamen Rider Core is purely an energy-based Rider, he was created from the Sasori, Kani, and Ebi Core Medals, which appeared to house his consciousness, merging with the Memory Memory which held the memories of all of the older Showa Era Kamen Riders and the True Gaia Memory, thanks to the Pteradon Yummy gathering them. Because of these memories being housed in him, Core possessed various traits from previous Riders. The main source of his power came from a crystallized form of Earth's energy. The crystal was destroyed by Double CycloneJokerXtreme's Bicker Charge Break and OOO's OOO Bash. This, however, did not drain his powers completely, as Double and OOO had believed. Instead, it only removed some of his power, and in his fury he stopped (albeit briefly) OOO from assuming Tajadol Combo.