Volcanion @ Choice Specs
Ability: Water Absorb
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Steam Eruption
- Fire Blast
- Earth Power
- Sludge Wave
Empoleon @ Leftovers
Ability: Torrent
EVs: 252 HP / 76 Def / 180 SpD
Calm Nature
IVs: 0 Atk
- Scald
- Stealth Rock
- Toxic
- Protect
Altaria @ Altarianite
Ability: Natural Cure
EVs: 248 HP / 84 Def / 176 Spe
Timid Nature
IVs: 0 Atk
- Hyper Voice
- Roost
- Defog
- Ice Beam
Breloom @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Spore
- Bullet Seed
- Mach Punch
- Swords Dance
Krookodile @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Knock Off
- Earthquake
- Pursuit
- Stone Edge
Crobat @ Flyinium Z
Ability: Infiltrator
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Taunt
- Roost
- U-turn
Ability: Water Absorb
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Steam Eruption
- Fire Blast
- Earth Power
- Sludge Wave
Empoleon @ Leftovers
Ability: Torrent
EVs: 252 HP / 76 Def / 180 SpD
Calm Nature
IVs: 0 Atk
- Scald
- Stealth Rock
- Toxic
- Protect
Altaria @ Altarianite
Ability: Natural Cure
EVs: 248 HP / 84 Def / 176 Spe
Timid Nature
IVs: 0 Atk
- Hyper Voice
- Roost
- Defog
- Ice Beam
Breloom @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Spore
- Bullet Seed
- Mach Punch
- Swords Dance
Krookodile @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Knock Off
- Earthquake
- Pursuit
- Stone Edge
Crobat @ Flyinium Z
Ability: Infiltrator
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Brave Bird
- Taunt
- Roost
- U-turn
I decided to build around Choice Specs Volcanion due to its sheer breaking power and strong STAB and coverage moves. It benefits from having entry hazards present on the field, so I decided to add Stealth Rock Empoleon to reliably set them up especially against some defensive Defoggers due to its typing and access to Scald and Toxic, and it also helps in the Moltres matchup with Protect + Toxic to stall out Fire Blasts. The Stealth Rock weakness and Breloom matchups were a problem, so I added Defog Mega Altaria to provide removal, and I used Ice Beam to help the team beat Gliscor, which can be problematic. Breloom provides a strong setup Pokemon that can act as both a breaker and a cleaner with Mach Punch, and it can pressure defensive teams with its STAB moves and Spore. Mach Punch also provided some speed control. Aside from one priority move, the team was looking slow, so I added Choice Scarf Krookodile to help revenge kill faster Pokemon like Mega Aerodactyl and Mega Pidgeot and also provide utility with Knock Off and particularly Pursuit so Latias and Gengar don’t become too much of a problem. Crobat provides a much-needed Ground immunity after Altaria has Mega Evolved, and Infiltrator helps in the Serperior matchup a lot. Flyinium Z + Taunt and U-turn utility helps power through bulkier Pokemon too.