The technique was beautifully displayed in the anime by giving a silhouette of Ace's Fire Fist behind Luffy, a symbol of Luffy carrying on his brother's will. This comparison is also noted by Tama ...

Ace—aka Fire Fist—that has made him a fan favorite ... the Alabasta storyline when he reunites with his sworn brother, Luffy, and introduces himself to the Straw Hat crew.