One Piece's Monkey D. Luffy isn't invincible; here are some strong characters who have managed to overpower him.

In Wano, Luffy awakened to the true form of his ... For her to be terrified of Nika, in other words, Luffy, just goes to show just how strong Luffy has become. Just a few arcs ago, he was ...

However, due to the nature of his Devil Fruit, possessing the powers of the Sun God Nika, many One Piece fans believe that Luffy is only able to keep up with strong characters in the series ...