Shuckle, Zygarde, Magearna +3 Pokémon Team

Shuckle @ Mental Herb
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
IVs: 0 Spe
- Sticky Web
- Stealth Rock
- Encore
- Toxic

Zygarde @ Leftovers
Ability: Power Construct
EVs: 252 HP / 240 SpD / 16 Spe
Careful Nature
- Coil
- Thousand Arrows
- Substitute
- Rest

Magearna @ Fairium Z
Ability: Soul-Heart
EVs: 252 SpA / 252 Spe / 4 Def
Timid Nature
- Shift Gear
- Fleur Cannon
- Thunderbolt
- Ice Beam

Ash-Greninja @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 252 Spe / 4 SpD
Timid Nature
- Hydro Pump
- Dark Pulse
- Water Shuriken
- Spikes

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 136 SpD / 120 Spe
Calm Nature
- Magma Storm
- Toxic
- Taunt
- Earth Power

Kartana @ Fightinium Z
Ability: Beast Boost
EVs: 252 Atk / 252 Spe / 4 SpD
Jolly Nature
- Swords Dance
- Leaf Blade
- Sacred Sword
- Smart Strike