Here’s a deep-feature breakdown regarding the use of Supreme King Haki (Haoshoku Haki) by Monkey D. Luffy in One Piece.
If you want to see Luffy use the Advanced form of Supreme Haki (coating his fists without touching the enemy), the specific episode is: which episode luffy use supreme haki
Conclusion
Post-Timeskip: Fish-Man Island (first explicit post-timeskip hint) Here’s a deep-feature breakdown regarding the use of
After training with Silvers Rayleigh, Luffy masters the ability to use Haki at will. Episode 478 (Marineford Arc): His most famous pre-timeskip
Episode 478 (Marineford Arc): His most famous pre-timeskip use. Luffy unleashes a massive shockwave to stop Ace's executioners, shocking the Admirals and Whitebeard alike. 🎓 Mastering Supreme King Haki (Post-Timeskip)
Luffy first utilizes Supreme King Haki in episode 389 against Duval's bull, with his first major display occurring in episode 413 to stop the Boa sisters on Amazon Lily. Later, he exhibits mastery post-timeskip, knocking out 50,000 enemies in episode 554, and eventually masters advanced infusion during the Wano arc. For a full, detailed breakdown of these episodes and Haki's, visit the One Piece Wiki.