Pluto

Pluto (also known as Plute) is the King of the Underworld who resides on the lowest level of the Dwarven Temple dungeon in Tales of Phantasia. He serves the purpose of an unlockable Summon Spirit who can make a pact with Claus F. Lester if the party is in possesion of a Lapis rang.

Abode
Pluto's home is the ruined Dwarven Temple which sits on a ledge far below the earth and inside the Mines of Morlia. If the player wishes to make a pact with him, they must first traverse 21 levels of the mine and then another 9 inside the heart of the temple itself.

SNES version
Neither Pluto, nor his dungeon were included in the SNES version of Tales of Phantasia.