Donkachi

"Soiya!/Come On! Donguri Squash/Au Lait!"

- Finisher announcement via Sengoku Driver

The Donkachi (ドンカチ) is the weapon of Kamen Rider Gridon and Kamen Rider Gaim in Donguri Arms, taking the form of a warhammer, with the head of said hammer taking the form of a stylized acorn. This weapon is accessed through the Donguri Lockseed. However, it also can be summoned and utilized by Gaim if he assumes Kiwami Arms.

Finishing attacks

 * Donkachi Giant Rotation (ドンカチ大回転): After Gridon activates his Sengoku Driver's Squash function, he spins at high speeds with the Donkachi held out. The spinning forms an acorn projection before Gridon knocks the opponent with a high-velocity hammer slam.
 * Gridon Impact (グリドンインパクト): After Gridon activates his Sengoku Driver's Au Lait function, he dives from above and strikes the enemy with the Donkachi.