Also, don't forget that you can do 95% of just about every optional quest, just don't get the character at the end. For example, you can get almost all of the items in Owzer's Mansion and the Phoenix Cave, just don't finish the quest to get Relm or Locke. You can even beat Umaro and do his whole cave, because you don't have Mog so Umaro won't join your party.