First off, I'll link you a team synergy type chart from Team Magma's team builder. Its a really helpful source in teambuilding VGC teams
http://www.teammagma.net/teambuilder/#?6...72|534|212
You'll notice that this team is considerably weak to Flying, Fire, Water (though can be neglected with Drought up), Psychic and Ice types. On paper, this team doesn't have a solid answer to Talonflame who can just use its STAB options to tear this team apart. Another important aspect is your team absolutely needs a Wide Guard user to block Rock Slide attacks against Charizarid Y. Though you might not have considered this but Charizard Y's Drought can be used against you considering two of the 6 members are weak to Fire hits (Scizor and Breloom) while the two others (Gliscor and Conkeldurr) won't appreciate taking consistent Fire hits from say Heatran. For this team, I'm going to give you some consistent EV spreads for Charizard, Sylveon, Conkeldurr and Scizor. The other two Pokemon in Breloom and Gliscor I'll highly suggest you replace, especially Gliscor since it doesn't do much aside from provide Tailwind support. Remember in VGC match, you are on a timer and stall/full setup isn't the best option. While Breloom is a solid choice for the VGC meta I just don't see it functioning well aside from beating Water types which Charizard should be the one doing. It's just that this team has two Fighting type Pokemon already and Conkeldurr can provide Wide Guard support as well.
Again I'm going to assume you are not using or don't have access to legendary Pokemon like say Terrakion, Landorus-T, Cresselia, etc the first team doesn't have any. My two recommendations for this team are Hydreigon and Rotom-W since both alleviate your main weakness to above types I mention. Now since you don't have access to speed control anymore, you can try out support Hydreigon with Tailwind or Thunder Wave Rotom-W with Reflect. Tailwind Hydreigon is something most teams won't prepare for since they'd expect a regular Hydreigon to be the usual Life Orb/Specs/Scarf variants. Hydreigon can still work well with just its two main STAB options while Charizard Y and Scizor could handle Fairy threats. Reflect Rotom-W is opted instead of Will-O-Wisp since there's still a 15% chance to miss as oppose to Reflect which can be give the team additional artificial bulk. Thunder Wave is opted instead of Protect since you want to caught your opponent's off guard with paralysis so Charizard Y can ensure a sweep with its Heat Wave. I'll list down the rest of the team down below.
Charizard-Mega-Y @ Charizardite Y
Ability: Drought
Level: 50
EVs: 252 HP / 4 Def / 36 SpA / 12 SpD / 204 Spe
Modest Nature
- Heat Wave
- Solar Beam
- Overheat / Hidden Power Ground / Focus Blast
- Protect
-Typical Bulky Charizard Y with investment enough to outspeed Landorus-T and take a Jolly Mega Kangaskhan's Return
-Overheat is to overpower any Pokemon or bypass Wide Guard, HP Ground is reserved for Heatran while Focus Blast hits Heatran, Mega Kangaskhan, and Tyranitar hard but has shaky inaccuracy issues
Sylveon @ Pixie Plate
Ability: Pixilate
Level: 50
EVs: 92 HP / 116 Def / 220 SpA / 4 SpD / 76 Spe
Modest Nature
- Hyper Voice
- Hyper Beam
- Helping Hand
- Protect
-Gave it enough speed to outspeed max speed Thundurus, Latios and Terrakion under Tailwind
-Helping Hand is to boost the power of any partner Pokemon by times 1.5 which can help out Charizard Y
-Pixilate Hyper Beam with Pixie Plate can OHKO 4 HP Mega Kangaskhan
Scizor @ Lum Berry
Ability: Technician
Level: 50
EVs: 164 HP / 252 Atk / 92 Spe
Adamant Nature
- Bullet Punch
- Bug Bite
- Quick Guard
- Protect
-Outspeeds slow variants of Politoed
-Quick Guard to stop Priority hits except from fast Fake out users
-Lum Berry to prevent burns
Conkeldurr @ Leftovers
Ability: Guts
Level: 50
EVs: 144 HP / 132 Atk / 68 Def / 164 SpD
Adamant Nature
- Drain Punch
- Mach Punch
- Ice Punch
- Wide Guard
-Really had a difficult time choosing items Conkeldurr so just slapped lefties
-Gave it Wide Guard to block spread damage
Hydreigon @ Life Orb
Ability: Levitate
Level: 50
EVs: 32 HP / 28 Def / 212 SpA / 236 Spe
Modest Nature
- Draco Meteor
- Dark Pulse
- Tailwind
- Protect
-Outspeed 252 Adamant Arcanine
-Tailwind Setter
Rotom-Wash @ Sitrus Berry
Ability: Levitate
Level: 50
EVs: 252 HP / 44 Def / 44 SpA / 156 SpD / 12 Spe
Calm Nature
IVs: 0 Atk
- Thunderbolt
- Hydro Pump
- Reflect
- Thunder Wave
-Already discussed beforehand so another standard Rotom-W
. But this looks like a solid team. I dont recommend putting 252/252/4 in every stat, spreading them out is better for VGC because of the doubling up. If I were you I would use the team that Black gave you in his comment.
