How could you use Roxas throughout all of Kingdom Hearts II

How You Could Get To Play As Roxas.
Well I'm not really sure about that one because I tried to find somthing about that myself with my friend Brenden and i didnt find anything so i figure i will just try somthing else. If you need anymore help with Kingdom Hearts II codes I could help you. What I mean by that is if you cant find anything about Kingdom Hearts II or any other game I could give you some information. If you would like you could e-mail me at [email protected]. There will be a great possibility that I will be able to answer your e-mail. But there is also a possibility that I can't. Well thank you for taking your time to read this and please e-mail me if you need any information on anyother video game or any other Kingdom Hearts II cheats. I will post an answer if I find any answers to your question.  
Go to this webbsite http://www.neoseeker.com/Games/Products/PS2/kingdom_hearts2/action_replay.HTML there you have cheats to be roxas trough the whole game and even more characters!