Thanks :). I have a synchronise timid espeon. Elena90 said something about like having accelgor at 200 hp and use final gambit to see if Xerneas is 30-31 hp ivs. Also smeargle at 129 speed stat. If Xerneas outspeed it then it is 30-31 hahaYou're good to go if you have a masterball and a leading pokemon with Synchronize... otherwise a Smeargle with Spore and False Swipe will help. Oh, you can also use this to check its stats: http://pokemonshowdown.com/damagecalc/ (make sure to set it to level 50 with no EV's).