Mega Swampert

Manaphy @ Waterium Z
Ability: Hydration
EVs: 32 HP / 252 SpA / 224 Spe
Modest Nature
IVs: 0 Atk
- Tail Glow
- Rain Dance
- Scald
- Energy Ball

Swampert-Mega @ Swampertite
Ability: Damp
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Power-Up Punch
- Waterfall
- Earthquake
- Ice Punch

Goodra @ Assault Vest
Ability: Sap Sipper
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk
- Draco Meteor
- Flamethrower
- Ice Beam
- Sludge Wave

Pelipper @ Damp Rock
Ability: Drizzle
EVs: 248 HP / 252 Def / 8 SpA
Bold Nature
IVs: 0 Atk
- Roost
- Defog
- Scald
- Hurricane

Jolteon @ Choice Specs
Ability: Volt Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Thunder
- Shadow Ball
- Hidden Power [Ice]

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 248 HP / 88 Def / 172 SpD
Careful Nature
- Stealth Rock
- Leech Seed
- Power Whip
- Knock Off