WELL,WHEN YOU BEAT THE ELITE FOUR AND HAVE THE NATIONAL DEX.,YOU CAN GO TO BEBE'S HOUSE IN HEARTHROME CITY WHICH IS NEAR THE POKECENTER AND SHE WILL GIVE YOU AN EEVEE!!!THEN GO TO ETERNA FOREST OR OUTSIDE SNOWPOINT CITY AND YOU WILL FIND A ROCK(BOTH PLACES).THEN GO NEAR IT AND GROW YOUR EEVEE UP ONE LV. JUST!!!SHE WILL EVOLUTE INTO LEAFEON IF YOU ARE IN ETERNA'S FOREST OR INTO GLACEON IF YOU ARE NEAR THE ROCK OF SNOWPOINT!!!