[RATE MY TEAM] First Competitive Team

[UnholyBlade]

I will be honest, I have never made a competitive team before so I'm a little scared of trying it out. However, I know that I can get help learning about what works well together from the feedback here, so here's a team that I want to try. It's a bit Attack oriented trying to take down the opponents fast, but I don't know if it would work. Any help would be really appreciated to learn the ropes.

Blastoise-Mega @ Blastoisinite
Ability: Mega Launcher
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
- Dark Pulse
- Ice Beam
- Water Pulse
- Aura Sphere

Rhyperior @ Sitrus Berry
Ability: Solid Rock
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- Earthquake
- Stone Edge
- Ice Punch
- Megahorn

Rotom-Heat @ Choice Scarf
Ability: Levitate
EVs: 64 HP / 192 SpA / 252 Spe
Timid Nature
- Will-O-Wisp
- Overheat
- Volt Switch
- Dark Pulse

Aegislash @ Weakness Policy
Ability: Stance Change
EVs: 252 HP / 4 Atk / 4 Def / 176 SpA / 72 SpD
Quiet Nature
- King's Shield
- Shadow Sneak
- Flash Cannon
- Shadow Ball

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 184 HP / 252 Atk / 72 Spe
Adamant Nature
- Ice Fang
- Acrobatics
- Earthquake
- Roost

Sylveon @ Choice Specs
Ability: Pixilate
EVs: 252 HP / 44 Def / 208 SpA / 4 SpD
Calm Nature
- Draining Kiss
- Hyper Voice
- Psyshock
- Helping Hand