Mono-Fairy Elite Four Team:

Carbink @ Light Clay
Ability: Clear Body
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Light Screen
- Reflect
- Stealth Rock
- Toxic

Klefki @ Leftovers
Ability: Prankster
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Spikes
- Thunder Wave
- Flash Cannon
- Toxic

Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Hyper Voice
- Heal Bell
- Wish
- Protect

Magearna @ Choice Specs
Ability: Soul-Heart
EVs: 252 HP / 252 SpA / 4 Def
Modest Nature
- Fleur Cannon
- Flash Cannon
- Shadow Ball
- Aura Sphere

Azumarill @ Choice Band
Ability: Huge Power
EVs: 172 HP / 252 Atk / 84 Spe
Adamant Nature
- Play Rough
- Waterfall
- Aqua Jet
- Superpower

Mimikyu @ Life Orb
Ability: Disguise
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Shadow Sneak
- Play Rough
- Shadow Claw