Mega Steelix BO

Steelix-Mega @ Steelixite
Ability: Sturdy
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Heavy Slam
- Stealth Rock
- Rest
- Sleep Talk

Greninja @ Life Orb
Ability: Protean
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Ice Beam
- Gunk Shot
- Extrasensory
- Hidden Power [Fire]

Tangrowth @ Rocky Helmet
Ability: Regenerator
EVs: 248 HP / 212 Def / 48 SpD
Relaxed Nature
- Sleep Powder
- Giga Drain
- Knock Off
- Hidden Power [Ice]

Zygarde @ Leftovers
Ability: Aura Break
EVs: 240 HP / 212 SpD / 56 Spe
Careful Nature
- Substitute
- Coil
- Thousand Arrows
- Toxic

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 68 Spe
Bold Nature
IVs: 0 Atk
- Taunt
- Nature's Madness
- Moonblast
- Defog

Tyranitar @ Choice Scarf
Ability: Sand Stream
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Stone Edge
- Pursuit
- Crunch
- Superpower