Bellamy is the user of the Bane Bane no Mi, which Allows him to turn his legs (we don't know whether any other limb) into springs, and jump with them at high speed. Using this ability, he can rush mighty blows with momentum, making Bellamy a strong adversary.
Spring Death KnockKanji: スプリング死拳（デスノック）
Translation: Spring Death Knock
Bellamy turns one arm into a giant spring and returns a powerful punch.
Spring HopperKanji: スプリング跳人（ホッパー）
Translation: Spring Hopper
A stronger version of "Spring Snipe". Bellamy turn his legs into springs again, but this time he ricochets off of several objects to gain speed and disorient opponents before striking.
Spring SnipeKanji: スプリング狙撃（スナイプ）
Translation: Spring Snipe
Bellamy turns both of his legs into springs, then launches himself at his opponent with a punch or tackle.