You Dont need a codec pack(or Any codec) to watch any anime on VLC.It's built on a different technology then WMP. BUt if you want to watch Rm video's on it you then need the Hack Real Codec. Check Doom9 for it, But It might Play it now. Dont remeber RM Sucks So I have not tried for awhile..
Real anime Fans Like Xvid and H.264 encodes