Luffy has received many amazing power-ups in One Piece over the years, but Gear 5 isn't the strongest of them all.

The Straw Hat Pirates have grown tremendously in strength in One Piece. These are their strongest transformations.

Luffy’s stretchy powers are as synonymous with One Piece as Goku’s Kamehameha ki blast is with Dragon Ball. After devouring a mysterious Gum-Gum Fruit in a youthful moment of absent-minded hunger, ...