Trick Lead Drifblim
Drifblim @ Choice Scarf
Ability: Unburden
EVs: 252 HP / 24 Def / 234 Spe
Nature: Timid
- Trick
- Substitute
- Calm Mind / Stockpile
- Baton Pass
This may look odd at first, but the true brilliance will soon dawn upon you. Using Trick alongside Unburden, you'll be able to lock the opposing lead into a single move, losing your Choice Scarf, and gaining, hopefully, Leftovers, or in some cases, Focus Band. Even though you gain another item, Unburden still activates, meaning you get the +50% speed the Choice Scarf gave you, yet you aren't locked into a single move.
There's the ingeniousness of it, now, we go in more detail. So now what, they opponent is hopefully locked into Stealth Rock, forcing a switch, on the switch you're free to set up a Sub off of Drifblims ENORMOUS 504 HP, giving it a huge 126 HP Sub, from here, depending on what the opponent brought in, you can either pass it right away, or you can stay in, on say, a special attacker (if you're using CM) or either (if you're using Stockpile), in which case you'll use the boost up move before the attack (+50% Speed remember?), which if you're lucky, will give Driflbim enough bulk for them to not be able to break the sub, in which case you can use it again, then set up another sub and pass it on.
The EVs are meant for Drifblim to outspeed Max Speed Aerodactyl, meaning it will outspeed everything bar Ninjask without a Scarf. The rest of the EVs are dumped into HP for bigger subs, and the rest into Defense to take Bullet Punches from Metagross easier.