Pokemon X and Y Walkthrough - Snowbelle City
Walk west to the Pokemon Center. Inside, Mr. Bonding gives you the PP Restoring Power. The Snowbelle Gym is located in the center of the city, but its leader is currently away, so let's keep exploring the city for now. There are two houses directly north of the Pokemon Center. The one on the left has a man that will teach moves to Keldeo and Meloetta. The Battle Girl in this house gives TM 08 Bulk Up, which raises the user's Attack and Defense.
The house northeast of the gym has a man that gives a Revive if you show him a Pokemon that can learn Mat Block. The house in the northwest corner of town has a woman willing to trade her Bisharp for your Jigglypuff. You can catch a Jigglypuff on Route 20 south of the city. The house southwest of the gym has an old man that will teach a starter Pokemon from any generation a special move depending on their type: Frenzy Plant, Blast Burn, or Hydro Cannon. These moves do a lot of damage, but the user must recharge the turn after attacking.
Be sure to pick up the Full Restore in the southwest corner of the city. Once that's done, head south to Route 20.