Great job, Pichu, now she's burned giving you a slight advantage. Now for a little defense Double Team and spread out on the balls and toys. Then send Swift from each of your copies her way, they should gaurentee an unevadable hit. One of you should be able to get her or knock out her clones fairly quickly. Finally all of you hide under the balls as well and Relax. It should take the Evee a few tries to find the real you.

Double Team~Shockwave~Relax