One Piece: All of Luffy's forms, explained

Luffy’s entire One Piece family tree, explained

Luffy's 10 Strongest Attacks in One Piece (Ranked)

One Piece: How Luffy got his Straw Hat, explained

The Straw Hats' time-skip training in One Piece may not have been enough, and chapter 1120 shows how

One Piece: Luffy Finally Beats Kaido! Here Is How & When