In an interesting turn of events, the latest episode of the Pokémon Best Wishes anime series airing in Japan is said to feature the Pokémon Musicals from the Pokémon Black & White games.
It's thought the episode, titled Somewhere, Over the Rainbow! A Maractus Musical! will see Pikachu and friends take part in a friendly Musical, such as the ones seen in the Pokémon Black & White games.
Nothing more is known about the episode, other then it's due to air on the 27th of October after a weeks break of Best Wishes so the Pikachu adventure Pikachu's Really Mysterious Adventure can be aired. The episode aired before the break will be the one that sees Ash take on Unova champion Alder.