Mega-Swampert team

Sapete (Politoed) @ Damp Rock
Ability: Drizzle
Shiny: Yes
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
- Hydro Pump
- Focus Blast
- Hypnosis
- Ice Beam

La Piña (Ferrothorn) @ Leftovers
Ability: Iron Barbs
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 Def
Relaxed Nature
IVs: 0 Spe
- Leech Seed
- Stealth Rock
- Power Whip
- Gyro Ball

Bicharraco (Scizor) @ Leftovers
Ability: Technician
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Swords Dance
- Bullet Punch
- Roost
- Defog

Vapor (Vaporeon) @ Leftovers
Ability: Hydration
Shiny: Yes
EVs: 188 HP / 252 Def / 68 SpD
- Scald
- Ice Beam
- Heal Bell
- Wish

Chandelure @ Choice Scarf
Ability: Infiltrator
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Energy Ball
- Dark Pulse
- Shadow Ball
- Fire Blast

Gym Swampert (Swampert-Mega) @ Swampertite
Ability: Swift Swim
EVs: 104 HP / 252 Atk / 152 Spe
Adamant Nature
- Earthquake
- Ice Punch
- Waterfall
- Low Kick