ライダーキック
is the boss class of the Worm army. He is dressed in a black trench coat and wields a cane which he uses in battle. Possessing uncanny martial art skills, he is powerful enough to take on Kagami and Tendou in his human form, while they are in their Rider forms. His first form, , has the capability of "Freeze", which is activated by clenching his left fist. Through this, he can completely stop the flow of time to the point in which even the power of Hyper Clock Up is purposeless. During his debut, he is able to completely neutralize Hyper Kabuto, even with the Perfect Zecter. He then later was destroyed by Hyper Kabuto's Maximum Hyper Cyclone. After his demise, he evolved into a stronger form by use of the ability, "Life of Immortality". In this form, he is able to absorb Worms and tachyon energy alike to gain their powers as shown when he absorbs two subordinate Worms and Gatack's Rider Kick. He later absorbs Sasword's Rider Slash, TheBee's Rider Sting, and Gatack's Rider Cutting; but failed to absorb a triple rider kick by Kabuto, Gatack, and KickHopper. He then later was destroyed by Hyper Kabuto's Maximum Hyper Cyclone. After his demise, he evolved split into two entities and assumes a new form of . When Tsurugi's Worm identity exposed, the Nogis tried to recruit Scorpio Worm as their minions, but instead Scorpio Worm turned them into his minions after showing he was superior to them in power. Ultimately, they face defeat after being defeated by Gatack, KickHopper, and PunchHopper.