Hydra Lop

Seismitoad @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Stealth Rock
- Scald
- Earthquake
- Protect

Celesteela @ Leftovers
Ability: Beast Boost
EVs: 248 HP / 12 Def / 248 SpD
Sassy Nature
- Heavy Slam
- Flamethrower
- Leech Seed
- Protect

Lopunny-Mega @ Lopunnite
Ability: Limber
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Return
- Power-Up Punch

Landorus-Therian (M) @ Choice Scarf
Ability: Intimidate
EVs: 128 HP / 128 Def / 252 Spe
Jolly Nature
- Defog
- Earthquake
- U-turn
- Hidden Power [Ice]

Magearna @ Fairium Z
Ability: Soul-Heart
EVs: 252 HP / 252 SpA / 4 SpD
Quiet Nature
IVs: 0 Atk
- Fleur Cannon
- Focus Blast
- Thunderbolt
- Trick Room

Hydreigon @ Choice Specs
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Draco Meteor
- Dark Pulse
- Flash Cannon
- Flamethrower