Welcome to the site, Deragf! I'm going on twenty-four hours with no sleep, so hopefully this is coherent.

Okay, Taxi, we're not gonna let this Pikachu-wannabe smack us around. Begin by lulling her into a slumber with Sing. Then, if she's asleep, double Dream Eater. If not, use Rain Dance followed by Surf.

Sing ~ Dream Eater x2 (sub: Rain Dance ~ Surf)