My best team

Sigilyph @ Life Orb
Ability: Magic Guard
Shiny: Yes
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Ancient Power
- Energy Ball
- Ice Beam
- Psychic

Volcanion @ Choice Specs
Ability: Water Absorb
EVs: 248 HP / 8 Atk / 252 SpA
Rash Nature
- Steam Eruption
- Sludge Wave
- Earthquake
- Fire Blast

Gliscor @ Toxic Orb
Ability: Poison Heal
Shiny: Yes
EVs: 184 HP / 252 Atk / 72 Spe
Adamant Nature
- Acrobatics
- Fling
- Earthquake
- Roost

Absol-Mega @ Absolite
Ability: Magic Bounce
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Sucker Punch
- Knock Off
- Play Rough
- Foul Play

Xerneas @ Power Herb
Ability: Fairy Aura
Shiny: Yes
EVs: 248 HP / 8 Atk / 252 SpA
Mild Nature
- Geomancy
- Aromatherapy
- Moonblast
- Horn Leech

Greninja @ Life Orb
Ability: Protean
Shiny: Yes
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Gunk Shot
- Acrobatics
- Blizzard
- Low Kick