This article or section will contain information that may be recognised as spoilers or in-game cheats. It is best to avoid them at any cost.
In the 3.0 Quest "The Lonely King", Taiyo-shin Enma is encountered at the Mountain of God located in the Nu Continent. After battling with Lord Enma, it is revealed that Taiyo-shin Enma hails from an alternate world where the Yo-kai World was ruined by war that not even him in a godly state could stop. After the quest line, players unlock the Enma Palace dungeon in Busters T, and can challenge Taiyo-shin Enma with a chance of befriending him in his instance.
If Tempura or Sukiyaki is played instead, Taiyo-shin Enma won't be featured in the quest, but can still be fought and befriended in the Enma Palace once it has been unlocked.