: This specialized "life paper" is made from the fingernail clippings of a person and reflects their life force. Ace gives it to Luffy as a symbol of their bond, allowing them to find each other again regardless of distance.
: The brothers assist an old pirate named Naguri in building a pirate ship and eventually team up to defeat a giant tiger that had previously bested them. One Piece Episode 499
: This episode is part of the Post-War Arc , focusing on a flashback of Luffy, Ace, and Sabo's childhood in the Gray Terminal and Mt. Colubo. : This specialized "life paper" is made from
: While the overarching flashback is canon, Episode 499 includes some filler elements, specifically the character Naguri, who was created for the anime to expand on the brothers' training. : This episode is part of the Post-War