Rate my gen 7 OU Team

Question

Charizard-Mega-Y @ Charizardite Y
Ability: Drought
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Heat Wave
- Air Slash
- Solar Beam
- Dragon Pulse
My mega evolution poke and weather manipulator plus a check for steel types

Lycanroc-Dusk @ Focus Sash
Ability: Tough Claws
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Rock Slide
- Accelerock
- Crunch
- Brick Break
My glass cannon whose purpose is of a wall breaker.

Breloom @ Choice Scarf
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Mach Punch
- Spore
- Bullet Seed
- Rock Tomb
Status abuser and then annihilate

Forretress @ Rocky Helmet
Ability: Overcoat
EVs: 116 HP / 140 Atk / 252 Def
Impish Nature
IVs: 0 Spe
- Gyro Ball
- Iron Defense
- Earthquake
- Rapid Spin
Spinner,necessary for Charizard to look out for SR

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 136 HP / 120 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Scald
- Earth Power
- Ice Beam
- Recover
Special wall,plus water type counter

Sylveon @ Life Orb
Ability: Cute Charm
EVs: 156 SpA / 252 SpD / 100 Spe
Calm Nature
IVs: 0 Atk
- Draining Kiss
- Calm Mind
- Moonblast
- Shadow Ball
Dragon type counter as they are pretty common.

Comments

Most of these ev spreads look really random. It's generally better to max out your hp on most defensive pokemon (with the exception of the Chansey line). A lot of these pokemon are also completely outclassed in sm ou(such as Forretress and Sylveon are completely outclassed in sm ou and should be replaced. For example,  Sylveon doesn't counter any of the dragon types in ou, it's outclassed on offense by Tapu Lele and on defense by Clefable.
I'll try to keep the original concept of the team intact in my rate though.

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Thank you for ur guidance but would plz tell me which pokemon needs to have their ev spread changed,Cdijk16?

Answer 1

New Team: https://pokepast.es/75531a4bb873107d
I tried to keep the original concept of the team intact, which i'm assuming is Zard Y + Rapid Spin Bulky Offense. I didn't replace more than 3 pokemon for thst reason.
Major Changes
Lycanrock-Dusk -> Choice Band Tyranitar
Tyranitar can use pursuit to trap and heavily weaken or KO common checks to Mega Charizard Y such as Mega Latias, Mega Latios and Chansey. It's also a much better wallbreaker than Lycanrock-Dusk, having higher attack, access to pursuit and much better bulk. It also sets sand to support Excadrill.
Forretress -> Excadrill
Excadrill is much more offensively threatening than Forretress and better at keeping rocks off as as a result. It can also sweep late game with sand up.
Sylveon-> Heatran
It provides a switchin to Tapu Lele and sets up Stealth Rock. It also pressures bulky teams with Pex and Chansey, which Mega Charizard Y appreciates.
Minor Changes
1. Replaced Air Slash on Zard Y with Focus Blast to hit Tyranitar and Heatran.
2. Replaced Dragon Pulse with Roost for more longevity.
3. Changed EV spread on Gastrodon to be more bulky.
4. Replaced Earth Power with Earthquake to hit CM Magearna.
5. Replaced IB with Toxic for Rotom Wash.

Comments

Thank you but how I am going to hit dragon types and fighting types like Keldeo  and Terrakion  without sylveon ?

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Swap out Gastrodon for Tapu Fini maybe? That's what I would've done if I could swap out more than 3 pokemon.

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I'd say you should put this as the best answer TBH