First Mega Medi

Medicham @ Medichamite
Ability: Pure Power
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Ice Punch
- Zen Headbutt

Muk-Alola @ Assault Vest
Ability: Poison Touch
EVs: 252 HP / 240 Atk / 16 SpD
Adamant Nature
- Gunk Shot
- Pursuit
- Shadow Sneak
- Knock Off

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 16 SpD / 52 Spe
Calm Nature
IVs: 0 Atk
- Moonblast
- Nature's Madness
- Defog
- Taunt

Landorus-Therian @ Rocky Helmet
Ability: Intimidate
EVs: 252 HP / 216 Def / 24 SpD / 16 Spe
Impish Nature
- Earthquake
- Stealth Rock
- Hidden Power [Ice]
- U-turn

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

Heatran @ Grassium Z
Ability: Flash Fire
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Magma Storm
- Earth Power
- Solar Beam
- Taunt