One Piece Fighting Path

[Oniichan_07]

Hi
This game is an online game. There is a way for my request as someone already did it but he refuses to show his method.
Basically my request is i want to try a character before its release date, its code is already in the files and can be used. According to the hints given by the guy is that we replace any available character codes by the codes of the new character we want to try. Problem is i can't find the codes of the characters. So please if someone is an expert in this. Please help. Thank You.