From Bulbapedia, the community-driven Pokémon encyclopedia.
Maroon Town (Japanese: エビチャタウン Ebicha Town) is a small, anime-exclusive town located in Johto. It is found in between Mahogany Town and Blackthorn City. It was featured in Will the Real Oak Please Stand Up?.
At one point, DJ Mary was going to interview Professor Oak in the town. However, Team Rocket learned about their plans and decided to go in disguise in order to get free food. When the real Professor and Mary arrived, they were stunned to see Jessie and James parading as them.
With the help of a contest, the townspeople were able to determine that Jessie and James were in disguise and figure out the real Professor Oak and DJ Mary. Once they were out of the way, the Professor and Mary began their interview and started answering fan's questions.