While the original games suggest Pokemon can't speak human language, the anime producers tackled the issue of whether Pokemon are able to speak. According to Dogasu, the Pocket Monster manga by ...

It’s time for the Pokémon Ping Pong tournament in Sandalstraw Town! Ash and Pikachu, Dawn and Ambipom, Barry and Empoleon, and Jessie and Meowth are all competing in this doubles tournament.