Black koko

Tapu Koko @ Choice Specs
Ability: Electric Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Dazzling Gleam
- Hidden Power [Fire]
- Thunderbolt

Kyurem-Black @ Icium Z
Ability: Teravolt
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Freeze Shock
- Fusion Bolt
- Hidden Power [Fire]
- Ice Beam

Latios @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Psyshock
- Defog
- Thunder Wave

Venusaur-Mega (M) @ Venusaurite
Ability: Chlorophyll
EVs: 248 HP / 164 Def / 96 SpD
Sassy Nature
- Giga Drain
- Sludge Bomb
- Earthquake
- Synthesis

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 248 HP / 216 Def / 4 SpA / 40 Spe
Impish Nature
- Stealth Rock
- Earthquake
- Hidden Power [Ice]
- Protect

Magearna @ Assault Vest
Ability: Soul-Heart
EVs: 248 HP / 8 Def / 252 SpD
Sassy Nature
IVs: 16 Spe
- Fleur Cannon
- Iron Head
- Hidden Power [Fire]
- Volt Switch