This is a chart from Touhoumon 1.8. Malice, Hisoutensoku, Hakurei Miko, lady tenma and others that look pretty "awesome" and "rare" are only avaible for the Champion (lame)
i've never been a big fan of any individual NPC having something in an RPG that couldn't be bought/stolen/found. case in point: the champion/Elite four post National Dex. it annoys me knowing that i can't get Ayakashi, VIVIT, Satsuki, or Kasen (ver 1.812) through "normal" means. :/