Q. If you attached Metal Energy to an Erika's Dratini, would you apply the Pokémon Power first or the Metal Energy?
A. The Metal Energy first (like a trainer). Watch out with using Metal on Erika's Dratini though. The Metal won't reduce the 10 damage to zero unless that's the entire amount done. (Dec 21, 2000 WotC Chat, Q5 & Q144)