Sanji's signature kick-based martial art, the Black Leg Style, was honed under Zeff. It allows him to fight fiercely without ever damaging his precious cooking hands.
Sanji's post-timeskip training gifted him Sky Walk, an aerial technique. By kicking the air, he gains incredible mobility, allowing him to dominate battles from above.
Sanji's mastery of Observation Haki makes him a formidable New World fighter. His ability to foresee and dodge attacks, even Katakuri's Future Sight, is truly remarkable.
During Enies Lobby, Sanji unveiled Diable Jambe, igniting his leg with intense flames. This fiery technique dramatically amplified his kicks, making them hotter and more powerful.
Despite rejecting his past, Sanji's dormant Germa genetic enhancements awakened in Wano. This unexpected upgrade granted him superhuman physical abilities, pushing his limits.
Ifrit Jambe is Sanji's ultimate power, fusing his Black Leg Style, Haki, and awakened Germa body with intense blue flames. It's a devastating culmination of his journey.