Pokémon Adventures: Black and White Vol 4

From the VIZ Media edition

A thrilling meeting with one of the Elite Four strains Black's brain. Then, it's opening night for White's Pokemon musical! Will everything go off without a hitch...? Not likely! And what will happen when another Trainer lures away White's star performer, Tepig Gigi? Plus, will White ever overcome her fears and learn to battle with her Pokemon?!

Source: Anime News Network Encyclopedia