Mr. Mime's Airy wall says that if the defending pokemon has less than 3 energy cards attached it prevents the damage done. The next sentence says, "If Mime Jr. is anywhere under Mr. Mime, prevent all effects of that attack, including damage, done to Mr. Mime." That last sentence seems to be independent of the first part. So would the attacking pokemon still have to have 3 or more energies to make a successful attack, or if Mime Jr. is anywhere under Mr. Mime then everything is prevented no matter what?