About my character and cannon characters...

If I create a character and in the character sheet I say my character used to work with a cannon character in the past (e.g. crocodile) is it permited or not?

No references to canon characters are allowed in history.

ok thank you

Since the site is stationed in an entirely different universe than canon is (AU), I'm pretty sure that none of the characters have ever existed in the site's time continuum to begin with, nor will they ever. Gol D. Roger's the exception to this, I believe, since he was the one that started off the whole chase for One Piece to begin with.

While canon characters don't exist, there are some similar organizations that do. There's a bounty hunting organization/guild similar to Baroque Works in the process of being created, as well as other factions important to the plot (Shichibukai, Yonkou, ect...).

https://theonepiecerp.rpg-board.net/t90-character-limitations

You have to ask an admin for permission to associate them with a canon character.