An RPG by Kouji Okada (the father of the Shin Megami Tensei series), Monster Kingdom: Jewel Summoner focuses on monster collection and battles. You play as Vyse, a Jewel Summoner. Jewel Summoners are people who can summon monsters that have been changed into jewel form. While Vyse never underwent the training required to become a Jewel Summoner, he did inherit a charm from his mother which gave him the summoning abilities. Vyse heads off on a quest to find Shenah, the killer of his mother.