When asking "which episode does Luffy use supreme haki," fans are really asking, "When does Luffy become a top-tier fighter?"
While he uses it several times without knowing, he only begins using it consciously after his two-year training with Rayleigh, starting around Episode 518 Key Supreme Haki Milestones which episode luffy use supreme haki
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) When asking "which episode does Luffy use supreme
However, if you mean the first time Luffy uses basic to knock out weak-willed people, that is Episode 413 (at the Sabaody Archipelago, after the Straw Hats are separated by Kuma). The world of One Piece continues to expand,
The world of One Piece continues to expand, and Luffy's Haki abilities will undoubtedly play a crucial role in his future adventures. As the series progresses, fans can expect to see more incredible displays of Haki, further cementing Luffy's status as a legendary pirate.
on Amazon Lily, Luffy releases a massive wave of Haki to save Marguerite, knocking out a large portion of the audience. The Summit War (Episode 478):