Zard Y+beat stall

Charizard-Mega-Y @ Charizardite Y
Ability: Drought
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Fire Blast
- Solar Beam
- Hidden Power [Ice]
- Tailwind

Magearna @ Assault Vest
Ability: Soul-Heart
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Flash Cannon
- Ice Beam
- Volt Switch
- Aura Sphere

Dugtrio @ Fightinium Z
Ability: Arena Trap
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Substitute
- Toxic
- Earthquake
- Reversal

Latios (M) @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Psyshock
- Roost
- Defog

Serperior @ Leftovers
Ability: Contrary
EVs: 56 HP / 200 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Leech Seed
- Substitute
- Leaf Storm
- Dragon Pulse

Landorus-Therian (M) @ Leftovers
Ability: Intimidate
EVs: 232 HP / 232 Def / 20 SpD / 24 Spe
Impish Nature
- Protect
- Earthquake
- Hidden Power [Ice]
- Stealth Rock