Double Primals Mega Vensaur

Groudon-Primal @ Red Orb
Ability: Desolate Land
Level: 50
EVs: 252 HP / 236 Atk / 20 SpD
Brave Nature
IVs: 2 Spe
- Precipice Blades
- Fire Punch
- Rock Slide
- Protect

Kyogre-Primal @ Blue Orb
Ability: Primordial Sea
Level: 50
EVs: 252 HP / 180 Def / 76 SpA
Quiet Nature
IVs: 2 Spe
- Scald
- Water Spout
- Thunder
- Protect

Meowstic @ Mental Herb
Ability: Prankster
Level: 50
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature
IVs: 0 Spe
- Trick Room
- Gravity
- Quick Guard
- Helping Hand

Venusaur-Mega @ Venusaurite
Ability: Overgrow
Level: 50
EVs: 252 HP / 252 SpA / 4 SpD
Quiet Nature
IVs: 0 Atk / 19 Spe
- Protect
- Grass Knot
- Sludge Bomb
- Sleep Powder

Raichu @ Zap Plate
Ability: Static
Level: 50
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- Volt Tackle
- Nuzzle
- Encore

Salamence-Mega @ Salamencite
Ability: Intimidate
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Naive Nature
- Protect
- Hyper Voice
- Double-Edge
- Draco Meteor