Initial changes

Charizard-Mega-X @ Charizardite X
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Dance
- Dragon Claw
- Flare Blitz
- Roost

Tapu Koko @ Magnet
Ability: Electric Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 30 Atk
- Thunderbolt
- Hidden Power [Ice]
- U-turn
- Taunt

Tangrowth @ Assault Vest
Ability: Regenerator
EVs: 252 HP / 4 Atk / 252 SpD
Serious Nature
- Giga Drain
- Sludge Bomb
- Earthquake
- Hidden Power [Ice]

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Whirlwind
- Defog
- Roost
- Counter

Keldeo @ Choice Scarf
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Scald
- Hydro Pump
- Secret Sword
- Icy Wind

Landorus-Therian @ Rockium Z
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Stone Edge
- Earthquake
- Stealth Rock
- Swords Dance