Help with a vgc team

[chaotikstrife]

new team

Mamoswine @ Choice Scarf
Ability: Thick Fat
EVs: 252 HP / 252 Atk
Adamant Nature
- Ice Shard
- Icicle Crash
- Earthquake
- Rock Slide

Rotom-Wash @ Sitrus Berry
Ability: Levitate
EVs: 252 HP / 84 Def / 132 SpA / 36 SpD / 4 Spe
Calm Nature
- Will-O-Wisp
- Hydro Pump
- Thunderbolt
- Volt Switch

Bisharp @ Life Orb
Ability: Defiant
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Knock Off
- Sucker Punch
- Iron Head
- Protect

Azumarill @ Assault Vest
Ability: Huge Power
EVs: 252 HP / 252 Atk
Adamant Nature
- Play Rough
- Superpower
- Aqua Jet
- Waterfall

Whimsicott @ Focus Sash
Ability: Prankster
EVs: 252 HP / 40 SpA / 216 Spe
Timid Nature
- Tailwind
- Encore
- Protect
- Giga Drain

Charizard-Mega-Y @ Charizardite Y
Ability: Drought
EVs: 252 SpA / 252 Spe
Modest Nature
- Heat Wave
- SolarBeam
- Overheat
- Protect