Uber team (eh)

Ho-Oh @ Leftovers
Ability: Regenerator
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Earthquake
- Sacred Fire
- Toxic
- Roost

Marshadow @ Focus Sash
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Shadow Sneak
- Close Combat
- Spectral Thief
- Stone Edge

Greninja-Ash @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Dark Pulse
- Surf
- Ice Beam
- Water Shuriken

Magearna @ Assault Vest
Ability: Soul-Heart
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Aura Sphere
- Flash Cannon
- Fleur Cannon
- Volt Switch

Gengar-Mega @ Gengarite
Ability: Shadow Tag
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shadow Ball
- Taunt
- Sludge Wave
- Focus Blast

Latios (M) @ Dragonium Z
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Draco Meteor
- Defog
- Ice Beam