I developed this team a while back, and I'd like to get some feedback on it.
Breloom @ Leftovers
HP: 252 / Atk: 252 / SpD: 4
Ability: Technician
Nature: Adamant
-Spore
-Mach Punch
-Bullet Seed
-Drain Punch
Breloom is a beast. Spore (Duh). Mach Punch, priority plus Technician boost. Drain Punch to eat away at the foe's HP while they're asleep. Bullet Seed does a ton with Technician boost.
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Slowbro @ Rocky Helmet
HP: 252 / Def: 252 / SpA: 4
Ability: Regenerator
Nature: Bold
-Slack Off
-Shadow Ball
-Psychic
-Scald
Slowbro is a great tank with great moves. With regenerator and slack off he gains HP back quickly. Rocky Helmet takes off some HP on physical sweepers when you switch in. Attacks for coverage.
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Zapdos @ Leftovers
HP:4 / Spe: 252 / SpA: 252
Ability: Pressure
Nature: Timid
-Air Cutter
-Signal Beam
-Thunderbolt
-Heatwave
Not much to say here, Zapdos is cool looking, with great speed and attacks.
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Medicham-Mega @ Medichamite
Atk: 252 / Spe: 252 / SpD: 4
Ability: Pure Power
Nature: Jolly
-Fake Out
-Drain Punch
-Bullet Punch
-Ice Punch
Mega-Cham is one of my favorite megas, it hits hard and fast. With Huge Power, Fake Out does a ton, Drain Punch to gain back HP, Bullet Punch for Fairies and priority, and Ice Punch to deal with Flying/Dragons.
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Heatran @ Air Balloon
SpA: 252 / HP: 252 / SpD: 4
Ability: Flash Fire
Nature: Modest
-Stealth Rock
-Flamethrower
-Earth Power
-Flash Cannon
Air Balloon + Flash Fire allows Tran to switch in on fire and ground-type moves. Stealth Rock is one of the best entry hazards, and the other moves for STAB + coverage.
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Cloyster @ King's Rock
HP: 252 / Atk: 252 / Def: 4
Ability: Skill Link
Nature: Adamant
-Icicle Spear
-Rock Blast
-Rapid Spin
-Razor Shell
I feel like Cloyster under rated. Even though he's in the UU tier, he does wonderfully in OU. I'm not a fan of the Shell Smash set, but I love the Skill Link + Icicle Spear + Rock Blast + King's Rock combo. Skill Link for the 5x hit moves, and Kings rock for flinching. Razor Shell for water STAB and Rapid Spin to clear hazards.