When you fight Hades try and dodge all his fire attacks and when he has to recharge his deck you can get in alot of hits but if you do get hit alot wait till he charges again and recover your HP.
You can also card break him easily he only has 3 or 4 high level attack and magic cards. You should really stock up on level 7 kingdom and olympia key blade cards. The simba magic card really helps in this batlle, a succesfull one will slice down some of his HP.
Added by: infoguy Dec 11th 2004, ID#3836