M-Sceptile + triple water

Sceptile-Mega @ Sceptilite
Ability: Overgrow
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Substitute
- Giga Drain
- Dragon Pulse
- Hidden Power [Fire]

Cloyster @ Focus Sash
Ability: Skill Link
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Ice Shard
- Shell Smash
- Rock Blast
- Icicle Spear

Arcanine @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 8 Atk / 252 Def
Relaxed Nature
- Extreme Speed
- Overheat
- Will-O-Wisp
- Morning Sun

Seismitoad @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Stealth Rock
- Earthquake
- Toxic
- Knock Off

Tentacruel @ Assault Vest
Ability: Liquid Ooze
EVs: 252 HP / 252 SpA / 4 Spe
Modest Nature
IVs: 0 Atk
- Acid Spray
- Giga Drain
- Scald
- Rapid Spin

Gardevoir @ Choice Scarf
Ability: Trace
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Psyshock
- Healing Wish
- Shadow Ball