All the crewmates in the game turn into Brian Griffin, and the mod doesn't stop there.

Source: https://gamerant.com/among-us-best-custom-skins-ranked/

Each of these crews leaves its mark on the Grand Line, whether through the fearsome sight of its Jolly Roger, the personalities of its crewmates, or its raw strength in combat.

Source: https://www.cbr.com/one-piece-pirate-crews-most-powerful-ranked-anime/

Funnily enough, Luffy's crewmates made more use of that mirror network than Brulee herself did.

Source: https://www.cbr.com/one-piece-villains-unique-powers/