Gastrogoat

Gogoat @ Leftovers
Ability: Sap Sipper
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Horn Leech
- Rock Slide
- Earthquake
- Bulk Up

Drapion @ Black Sludge
Ability: Battle Armor
EVs: 252 Atk / 252 Def
Impish Nature
- Pursuit
- Knock Off
- Poison Jab
- Ice Fang

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Hidden Power [Fire]
- Toxic
- Scald
- Recover

Diancie-Mega @ Diancite
Ability: Clear Body
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Protect
- Moonblast
- Earth Power
- Diamond Storm

Latias @ Leftovers
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Ice Beam
- Psyshock
- Defog
- Healing Wish

Lucario @ Life Orb
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Extreme Speed
- Bullet Punch