Wish Park is a world in Pokepark 2: Wonders Beyond alternate to the Pokepark. You first encounter it when you meet Sandile and Krokorok in the Cove Area. It is very gloomy, and the Pokemon there seem to be controlled.
When you reach Wish Park, Pikachu and Piplup head for Cofagrigus's Attraction. After they win, they are about to eat a cake when Pansear stops them. Before he can explain, though, Cofagrigus interrupts and shoves a cake in his face, which seems to make him like the other Pokemon there. He tries to give Pikachu and Piplup cakes, too, but Oshawott uses Razor Shell and destroys the cakes. In turn, Cofagrigus angers and challenges Pikachu, Piplup, and Oshawott to a battle. They beat him, and Gothita shows up to take him away. Gothita then lets them ring the Wish Bell there, and they do, which releases the Pokemon from Wish Park's control. However, Darkrai shows up and captures Piplup, but fails to get Pikachu and Oshawott.