Isabel's team

Mamoswine @ Choice Band
Ability: Thick Fat
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Ice Shard
- Earthquake
- Rock Slide
- Icicle Spear

Hydreigon @ Choice Specs
Ability: Levitate
Shiny: Yes
EVs: 36 HP / 36 Def / 252 SpA / 4 SpD / 180 Spe
Modest Nature
- Draco Meteor
- Dragon Pulse
- Dark Pulse
- Flamethrower

Aegislash @ Leftovers
Ability: Stance Change
EVs: 252 HP / 12 Def / 196 SpA / 28 SpD / 20 Spe
Modest Nature
- King's Shield
- Flash Cannon
- Shadow Ball
- Substitute

Staraptor @ Choice Scarf
Ability: Intimidate
EVs: 252 HP / 4 Atk / 252 Spe
Jolly Nature
- Brave Bird
- Final Gambit
- U-turn
- Close Combat

Ludicolo @ Assault Vest
Ability: Swift Swim
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Fake Out
- Hydro Pump
- Ice Beam
- Giga Drain

Rotom-Heat @ Life Orb
Ability: Levitate
Level: 52
EVs: 252 HP / 60 Def / 56 SpA / 140 SpD
Modest Nature
- Overheat
- Thunderbolt
- Will-O-Wisp
- Protect