Pokemon League

There is a Trainer next to the shop who will swap your currently active Pokémon's ball with a regular Pokéball.

Elite Four Knight - Dark Type

 * Bisharp Lv. 56
 * Malamar Lv. 56
 * Sharpedo Lv. 56
 * Weavile Lv. 56
 * Honchkrow Lv. 56
 * Absol Lv. 58 - Holding Absolite

Elite Four Kara - Fighting Type

 * Mienshao Lv. 56
 * Lucario Lv. 56
 * Hawlucha Lv. 56
 * Medicham Lv. 56
 * Scrafty Lv. 56
 * Blaziken Lv. 58 - Holding Blazikenite

Elite Four Leif - Grass Type

 * Ludicolo Lv. 56
 * Whimsicott Lv. 56
 * Ferrothorn Lv. 56
 * Sceptile Lv. 58 - Holding Sceptilite
 * Amoongus Lv. 56
 * Trevenant Lv. 56

Elite Four Nicola - Electric Type

 * Galvantula Lv. 56
 * Elektross Lv. 56
 * Lanturn Lv. 56
 * Magnezone Lv. 56
 * Electivire Lv. 56
 * Manectric Lv. 58 - Holding Manectite

Champion Herschel

 * Wailord Lv. 58
 * Yanmega Lv. 58
 * Mamoswine Lv. 58
 * Salamence Lv. 60 - Holding Salamencite
 * Tangrowth Lv. 58
 * Alakazam Lv. 58