The Plunger is one of the only useful items in Pokémon Pearl and Diamond. It can be found at Gloomyshore City, in the abandoned Lighthouse on the very top floor. However, in order to get it, the player has to answer five simple math questions, so it was worth it. The Plunger has to be used at the run-down McDonald's conviently located in Gloomyshore City. Unclogging the Toilet will result in getting a McDonald's Key, which will have to be used to get into the Manager's office. If the player looks behind the desk, they'll find over nine thousand PokeDollars.