Ou team help

[Bunnyman987]

Hey guys i was just looking for some help on my ous team.
Fedor (Gyarados) @ Lum Berry
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Aqua Tail
- Dragon Dance
- Iron Head
- Outrage

Serperior2 (Serperior) @ Leftovers
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Leaf Storm
- Magical Leaf
- Hidden Power [Fire]
- Dragon Pulse

Breloom2 (Breloom) @ Focus Sash
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bullet Seed
- Mach Punch
- Swords Dance
- Spore

Metagross-Mega2 (Metagross-Mega) @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Hammer Arm
- Bullet Punch
- Meteor Mash
- Zen Headbutt

Sylveon2 (Sylveon) (F) @ Choice Specs
Ability: Pixilate
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
- Hyper Voice
- Hyper Beam
- Echoed Voice
- Shadow Ball

Hydreigon3 (Hydreigon) @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Draco Meteor
- Dark Pulse
- Flash Cannon
- Earth Power

 

[PlatinumDude]

Iron Head and Outrage don't let Gyerados accomplish much. Fairies are already hit fine by Waterfall, while a neutral unSTABed Outrage does as much as a neutral STAB Waterfall. Non-Mega Gyarados is better off using Substitute + Dragon Dance for easier setup opportunities without the Mega Stone:
-Substitute
-Dragon Dance
-Waterfall
-Bounce
Nature: Jolly/Adamant
EVs: 88 HP/220 Atk/4 Def/196 Spe
Item: Leftovers
Ability: Intimidate

Yes, we get that Magical Leaf doesn't miss, but it's not that strong, really. If Serperior must use an alternative Grass move besides Leaf Storm, that move has to be Giga Drain to replenish lost health:
-Leaf Storm
-Dragon Pulse
-Hidden Power (Fire)
-Giga Drain/Taunt/Substitute
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Life Orb/Miracle Seed/Meadow Plate
Ability: Contrary

Heatran should replace Breloom, as you need a Talonflame check/counter:
-Stealth Rock
-Lava Plume
-Toxic
-Taunt/Protect/Roar
Nature: Calm
EVs: 248 HP/192 SDef/68 Spe
Item: Leftovers

or
-Fire Blast/Magma Storm
-Flash Cannon/Hidden Power (Ice)/Stone Edge
-Earth Power
-Stealth Rock
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Air Balloon

Why, oh why, are you using Hyper Beam and Echoed Voice on Sylveon? The former is strong, yes, but it makes Sylveon a sitting duck the next turn, and that's bad, considering how slow it is. Echoed Voice takes a bit too much time to get going and Sylveon isn't meant to say in battle for too long. Hyper Voice is the consistent Fairy STAB to use; it has no drawbacks whatsoever and is still powerful enough to leave dents in anything. Sylveon also needs Psyshock to deal with Poison Pokemon on the switch:
-Hyper Voice
-Psyshock
-Shadow Ball/Hidden Power (Fire/Ground)
-Baton Pass
Nature: Modest
EVs: 244 HP/252 SAtk/12 Spe
Item: Choice Specs
Ability: Pixilate