: 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 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. 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. : While the overarching flashback is canon, Episode