Yveltal @ Heavy-Duty Boots
Ability: Dark Aura
EVs: 248 HP / 76 Def / 184 Spe
Tera Type: Poison
IVs: 0 Atk
Timid Nature
- Foul Play
- Toxic / U-turn
- Taunt
- Roost

Yveltal @ Choice Scarf
EVs: 204 Def / 80 SpA / 224 Spe
Ability: Dark Aura
IVs: 0 Atk
Tera Type: Dark / Steel 
Timid Nature
- Foul Play
- Oblivion Wing / Roost
- Defog / Toxic
- U-turn