I used command @addmasterclass [ID]
Martial Artist --> 7 = Fighter, 8 = Swordsman
Spiritualist --> 9 = Crane Hermit, 10 = Turtle Hermit
Warrior --> 13 = Dark Warrior, 14 = Shadow Knight
Dragon Clan --> 15 = Healer, 16 = Poco Summoner
Mighty Majin --> 17 = Ultimate Majin, 18 = Grand Chef Majin
Wonder Majin --> 19 = Plasma Majin, 20 = Karma Majin