An anti-lead for you:
Tornadus @ No Item
Prankster
4 HP / 252 Atk / 252 Spd
Jolly Nature
-Taunt
-Acrobatics
-U-Turn
-Knock Off/Tailwind
Unless you see Weavile in Team Preview you can send this guy out against just about everything. Prankster Taunt blocks rocks, Scolipede shenanigans, and tons of common lead tactics, fearing only Deoxys-D's Magic Coat which has been exceedingly rare in my experience. A lot of folks expect Tornadus to run a special attacking set (probably setting up Rain Dance Turn 1), which can cause some missed predictions and switches. No item has the dual perks of mitigating Knock Off damage and making Acrobatics a strong STAB, which hurts everything that doesn't resist and can net some nifty 2HKO's if the opponent has to retreat with their lead. Tornadus' speed tier means you can U-Turn out of bad matchups if need be. He's also a fantastic scout for Choice Scarfs since so few things naturally outspeed it in the tier at these EVs (though it likely means watching him fall if they are Scarfed). Pick your utility in the last slot. I've found Knock Off best because Tornadus would rather stay in against Deoxys-D and some other Psychic types that are best held at bay with Taunt, and even if they switch out it gives you that wonderful secondary effect. Prankster Tailwind is a great last gasp if Tornadus has been preserved until the late game and you need to setup a revenge kill you couldn't otherwise net.
Tornadus @ No Item
Prankster
4 HP / 252 Atk / 252 Spd
Jolly Nature
-Taunt
-Acrobatics
-U-Turn
-Knock Off/Tailwind
Unless you see Weavile in Team Preview you can send this guy out against just about everything. Prankster Taunt blocks rocks, Scolipede shenanigans, and tons of common lead tactics, fearing only Deoxys-D's Magic Coat which has been exceedingly rare in my experience. A lot of folks expect Tornadus to run a special attacking set (probably setting up Rain Dance Turn 1), which can cause some missed predictions and switches. No item has the dual perks of mitigating Knock Off damage and making Acrobatics a strong STAB, which hurts everything that doesn't resist and can net some nifty 2HKO's if the opponent has to retreat with their lead. Tornadus' speed tier means you can U-Turn out of bad matchups if need be. He's also a fantastic scout for Choice Scarfs since so few things naturally outspeed it in the tier at these EVs (though it likely means watching him fall if they are Scarfed). Pick your utility in the last slot. I've found Knock Off best because Tornadus would rather stay in against Deoxys-D and some other Psychic types that are best held at bay with Taunt, and even if they switch out it gives you that wonderful secondary effect. Prankster Tailwind is a great last gasp if Tornadus has been preserved until the late game and you need to setup a revenge kill you couldn't otherwise net.