Yveldon

Yveltal @ Life Orb
Ability: Dark Aura
Level: 50
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Sucker Punch
- Knock Off
- Foul Play
- Protect

Groudon-Primal @ Red Orb
Ability: Desolate Land
Level: 50
EVs: 228 Atk / 28 SpA / 252 Spe
Hasty Nature
- Eruption
- Fire Punch
- Precipice Blades
- Protect

Mawile-Mega @ Mawilite
Ability: Intimidate
Level: 50
EVs: 244 HP / 252 Atk / 12 SpD
Brave Nature
IVs: 0 Spe
- Play Rough
- Iron Head
- Sucker Punch
- Protect

Amoonguss @ Mental Herb
Ability: Regenerator
Level: 50
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Spore
- Grass Knot
- Rage Powder
- Protect

Thundurus @ Focus Sash
Ability: Prankster
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Taunt
- Thunder Wave
- Protect

Cresselia @ Lum Berry
Ability: Levitate
Level: 50
EVs: 252 HP / 156 Def / 100 SpD
Sassy Nature
IVs: 0 Atk / 0 Spe
- Trick Room
- Safeguard
- Helping Hand
- Ice Beam