In the episode "Fairies in the Spring," King Harkinian is developing a water park for his people to use. In order to allow the water park to function, King Harkinian is draining water from King Oberon's spring. In an attempt to preserve their water, the fairies begin creating water monsters in the nearly completed water park to prevent its construction. King Harkinian goes to visit King Oberon and decides to use magic ponds to fill the pools at the water park.
After receiving King Harkinian's permission, King Oberon can be seen spending time at the completed water park.