Welcome!
Hey there, I'm kinda new to the forums, as well as online battling, but I think I've made a team that finally works well for me. I've found it has a lot of success in winning battles in an out of the ordinary way. This team has one objective. Annoy. Set up as many hazards as I can, couple with as many status ailments as possible and wait it out. After a few alterations here and there, I've established a team that works well against most, if not all opponents. I post this team to ensure I havent missed any important threats that somebody can point out for me. I appreciate any help I can get!

Dragonite
Leftovers | Multiscale | Careful Nature
252 HP 252 SDef 4 Spd
Substitute
Thunder Wave
Dragon Tail
Roost
Although this team doesn't have a 'lead' as such, Dragonite provides me with an excellent option of paralysing potential threats as well as giving me an option to switch in to Jirachi or Ferrothorn to et up hazards. Dragonite is the glue of this team. In most instances, after using Thunder Wave once, I will immediately switch out, and only bring him back in once most hazards are set up and several pokemon have status ailments. This is when Dragonite really shines. With its bulky EV spread, coupled with Substitute an Recover, KOing Dragonite proves a difficult task. Dragon Tail is the main move for Nite, because of the fact that is able to deal serious damage while also forcing switch outs into multiple hazards. This tactic on repeat has proven extremely effective for me. Dragon Tail also comes in handy when a Pokemon (usually a lead) sees Dragonite as an option to Dragon Dance, Swords Dance, Calm Mind or whatever, as they expect Dragonite to Dragon Dance themselves. After a Paralyse and a Dragon Tail, the effectiveness of this tactic is realised.

Scizor
Choice Band | Technician | Adamant
248 HP 252 Atk 8 Spd
U-turn
Bullet Punch
Superpower
Pursuit
Scizor serves as the main offensive threat on my team. It is mainly used as a revenge killer, something of which it fulfils decently. The wide coverage of moves makes it a great threat to a range of Pokemon, while Choice Band ensures it hits hard. Very hard.

Espeon
Leftovers | Magic Bounce | Timid
252 HP 4 SAtk 252 Spd
Calm Mind
Psychic
Shadow Ball
Stored Power
Hidden Power [Fighting]
At the moment, Espeon is by far my favourite Pokemon of BW OU. it just screams awesome sauce. Magic Bounce is undoubtedly one of the best abilities in the game and comes in super handy in my team. For those who may see Dragonite as an easy window to set up hazards, a switch in from Espeon makes my own job of setting up much easier. This also works particularly well in circumstances where I can predict a taunt, or paralyze, poison or burn. A well planned switch in also allows me to Calm Mind a few times, while in most cases forcing the opponent to switch out out. At this point, given Espeon's awesome speed, I am able to sweep at least a few Pokemon with my wide range of attacks.

Heatran
Leftovers | Flash Fire | Calm
252 HP 4 Def 252 SpD
Lava Plume
Stealth Rock
Roar
Protect
Heatran has replaced Jirachi and my team and so far has won me many battles when in tight situations. Heatran ensures my team doesn't have as big of a hole for fire, particularly Volcarana, who would have seen too many opportunities to Quiver Dance and sweep. Heatran also allows me to Stealth Rock and scout out potential threats with protect. This ensures Heatran is a safe switch in at many situations, who is also able to get rid of those who see Heatran as an option to set up with Roar.

Ferrothorn
Leftovers | Iron Barbs | Impish
252 HP 48 Def 208 SDef
Leech Seed
Thunder Wave
Spikes
Gyro Ball
Ferro's main goal is to set up Spikes. And with it's awesome defences, it does this job quite easily. Once switched in to a Pokemon that can hardly touch it, he ensures that he is capable of preventing those who setup on him with Leech Seed, which inflicts damage while also restoring health. Although not necessary given its role in the team, Gyro Ball is able to hit hard on the faster leads such as Dragonite, Salamence and Gengar. Thunder Wave also provides my team with a third option of Paralysis, if Jirachi and Dragonite are either fainted or unable to switch in safely.

Jellicent
Leftovers | Water Absorb | Bold
248 HP 216 Def 44 Spd
Scald
Will-O-Wisp
Recover
Taunt
Jellicent is a boss. With his awesome Special Defence and HP, being a special wall comes easy to him. Will-O-Wisp comes in great as it halves the attack of any potential threats, making its Special Defence an even greater attribute. Taunt ensures pesky leads can't setup, while hazards can't be deployed. Again, coupled with its awesome stats, it means Jellicent is able to Taunt and take a hit as well. Recover makes it even more annoying for opponents gradually wearing this boss down, while Scald provides some nice STAB that drives threats like Heatran away. Jellicent also provides