Get galactic key
BEAT A DUMB GYM LEADER! ! ! !
Kirlia and snowrunt.
I 1 hit ko'd Almost all of them with Empoleon level 77.
My best team is. Empoleon Lev 72 Togekiss Lev 65 Giratina Lev 55 oh and hp 250 Raichu Lev 48 Staraptor Lev 39 pichu Lev 29. Mind you my Pichu 1 hit k'od my staraptor with Thunder.
I have not beaten the elite four. What I do is I go in,I level up my pokemon until there strong enough at level 70 to 75.