Caught pokemon nature modifier?

[Kalarm]

Does such an AR code exist? I have a few caught pokemons I'd like to switch natures. I saw one, but it was for japan. Anyone know anything about it?

[FreeSpirit]

Did you use the search tool?

I believe there is a code to change the natures of your Pokemon by marking them in the PC box. Use the search tool cause I'm a bit too busy to link you to the post or thread that has it.