How is my team for gen 6 ou

Question

Metagross-Mega @ Metagrossite
Ability: Tough Claws
EVs: 108 HP / 148 Atk / 252 Spe
Jolly Nature
- Ice Punch
- Meteor Mash
- Bullet Punch
- Zen Headbutt

Ninetales @ Assault Vest
Ability: Drought
EVs: 92 HP / 92 Def / 140 SpA / 4 SpD / 180 Spe
Modest Nature
IVs: 0 Atk
- Dark Pulse
- Flamethrower
- Solar Beam
- Hex

Breloom @ Meadow Plate
Ability: Technician
EVs: 76 HP / 172 Atk / 4 Def / 252 Spe
Jolly Nature
- Leech Seed
- Spore
- Mach Punch
- Bullet Seed

Garchomp @ Life Orb
Ability: Rough Skin
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Stone Edge
- Earthquake
- Outrage
- Poison Jab

Milotic (M) @ Leftovers
Ability: Competitive
EVs: 164 HP / 4 Atk / 132 Def / 132 SpA / 76 SpD
Modest Nature
IVs: 0 Atk
- Recover
- Scald
- Ice Beam
- Mirror Coat

Rotom-Wash @ Sitrus Berry
Ability: Levitate
EVs: 84 HP / 92 Def / 124 SpA / 92 SpD / 116 Spe
Modest Nature
- Sucker Punch
- Hydro Pump
- Thunderbolt
- Volt Switch

Answer 1

• Can you explain what you're doing with your EVs? These spreads are very unconventional, which isn't necessarily a bad thing but it's not great if you've just assigned them without doing any real damage calcs.
• Metagross has really weak coverage without Hammer Arm. Use the move so you don't get walled by Steel-types. Most people would probably tell you to replace Ice Punch, but I love that move as a Landorus lure so maybe drop Bullet Punch.
• Ninetales is a weak Pokemon in OU, and this four-attacks set is underwhelming too. Use a more lethal wallbreaker like Victini or Volcanion, or a set-up sweeper like Volcarona.
• Use Swords Dance over Leech Seed on Breloom so it has a greater offensive presence and sweeping potential. Life Orb is a better item, but maybe you can justify Meadow Plate if you're precious about Breloom's HP.
• Use a Stealth Rock Garchomp. You can forego Poison Jab because that attack doesn't stop you from getting checked by fast offensive Fairy-types like Gardevoir and Diancie.
• You're probably better off spamming Scald than using Mirror Coat, simply because it's safer and pressures the burn. Use Haze to clear set-up sweepers. Slowbro, Suicune or Rotom-W might be better for what you're trying to achieve here.
• I would not use Rotom-W and Milotic on the same team. Your defensive core has really weak coverage of the metagame this way. Skarmory is a plug-and-play defensive Pokemon with a popular SpDef set that would help you deal with Pokemon like Gengar, Serperior and Kyurem-B. It would also give you Defog support.