Is there a pokemon I can replace for being a supporter or hazards remover or something?

Question

(Note: This team is for singles) If you think it should be for doubles, tell me. If anything makes this team better, tell me in the answers below!

Zacian-Crowned @ Rusted Sword
Ability: Intrepid Sword
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Behemoth Blade
- Play Rough
- Sacred Sword
- Swords Dance

Mewtwo @ Life Orb
Ability: Pressure
EVs: 252 SpA / 252 HP / 4 Spe
Modest Nature
IVs: 0 Atk
- Psystrike
- Aura Sphere
- Shadow Ball
- Recover

Charizard (M) @ Leftovers
Trait: Blaze
EVs: 2 Def / 2 SpD / 252 Atk / 252 Def
Adamant Nature (+Atk, -SAtk)
- Flare Blitz
- Earthquake
- Dragon Dance
- Fly

Grimmsnarl @ Light Clay
Ability: Prankster
EVs: 252 Atk / 2 Def / 2 SpD / 252 Spe
Adamant Nature
- Light Screen
- Play Rough
- False Surrender
- Reflect

Haxorus (F) @ Wide Lens
Ability: Mold Breaker
EVs: 252 Atk / 4 SpD / 252 Spe
Careful Nature
- Dragon Claw
- Dragon Dance
- Iron Tail
- Earthquake

Zeraora @ Heavy-Duty Boots
Ability: Volt Absorb
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Plasma Fists
- Volt Switch
- Close Combat
- Knock Off

I decided to do Life Orb Mewtwo instead of Wise Glasses, tell me if it's worth it.

Comments

what format? I assume it's Ubers?

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Let's say Ubers.

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2 EVs in a stat don't do anything, EVs should be able to be divided by 4. I don't quite see the point of investing in HP over Speed on Mewtwo, tbh. Jolly is much better that Careful on Haxorus. Fly isn't very good, as it's effectively only doing 45 BP damage per turn. I would try Dual Wingbeat for breaking subs, or Acrobatics for Knock Off.

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I invested in HP more because of Life Orb, just to be safe. Plus, Mewtwo will have so much HP, attacks are likely to only probably 2HKO, while my Mewtwo's Psystrike against Gengar (Uber Showdown Usage) is a guaranteed OHKO.

*252 SpA Gengar Shadow Ball vs. 252 HP / 0 SpD Mewtwo: 288-338 (69.2 - 81.2%) -- guaranteed 2HKO
Possible damage amounts: (288, 290, 294, 296, 300, 302, 306, 308, 314, 318, 320, 324, 326, 330, 332, 338)*

*252+ SpA Life Orb Mewtwo Psystrike vs. 0 HP / 0 Def Gengar: 798-944 (305.7 - 361.6%) -- guaranteed OHKO
Possible damage amounts: (798, 811, 819, 827, 837, 845, 858, 866, 876, 884, 892, 905, 912, 923, 931, 944)*

Plus, I'll Light Screen and Reflect, so the damage is even less.
And sure, I'll just put 4 EVs, instead of splitting them. What other improvements can there be?

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OK, I can answer it, but it might take a while. I was just pointing some things out, but I'll give it a go!

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Thank You!