Pls Rate my Gen 7 OU team!

Question

Mawile-Mega @ Mawilite
Ability: Huge Power
Shiny: Yes
EVs: 196 HP / 252 Atk / 24 Def / 36 SpD
Careful Nature
IVs: 0 SpA
- Play Rough
- Iron Head
- Knock Off
- Sucker Punch

Kartana-Mega (Kartana) @ Focus Sash
Ability: Beast Boost
Shiny: Yes
IVs 0 SpA
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
IVs: 0 SpA
- Leaf Blade
- Sacred Sword
- Smart Strike
- Knock Off

Excadrill (M) @ Focus Sash
Ability: Mold Breaker
Shiny: Yes
IVs 0 SpA
EVs: 252 HP / 4 Atk / 252 Spe
Impish Nature
- Stealth Rock
- Rock Tomb
- Earthquake
- Rapid Spin

Ash-Greninja-Mega (Greninja-Ash) (M) @ Life Orb
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Ice Beam
- Dark Pulse
- Hydro Pump
- Water Shuriken

Blacephalon-Mega (Blacephalon) @ Focus Sash
Ability: Beast Boost
Shiny: Yes
Hidden Power: Ice
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Hidden Power [Ice]
- Flamethrower
- Psyshock
- Shadow Ball

Tapu-Lele-Mega (Tapu Lele) @ Life Orb
Ability: Psychic Surge
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Moonblast
- Energy Ball
- Hidden Power [Fire]

Comments

You already have dark pulse as a reliable STAB on greninja. You could replace that with water shuriken (priority, minimum 60 bp isn't bad)

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I'm quite confused what your comment is supposed to be saying. You're telling the OP to replace Dark Pulse with Water Shuriken?

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@○Celestial Shadows● They asked the OP to replace Dark Pulse with Shuriken, which they did.

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Ah, I see. Is that good tho? I don't know much about OU...

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A Dark-type STAB is mandatory on Battle Bond Greninja. They can either replace U-Turn or Water Shuriken with it, as Lux405's suggestion was not the best.

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Also, what is that EV Spread on Mawile? I think you should make it 252 HP/252 Atk/4 Spe or 196 HP/252 Atk/60 Spe