One Piece has finally explained the reason why Red-Haired Shanks is considered one of the strongest pirates in the world. The character, who inspired the series protagonist Luffy to become a pirate, is still shrouded in mystery, despite making his debut in the very first chapter of the series. However, a promotional booklet written by One Piece author Eiichiro Oda explains Shanks' fearsome reputation as one of the most powerful pirates. Not too long after that, Shanks gave the biggest showcase of his powers in the manga, further explaining his fearsome reputation.
