Unfezant for speed support in double and triple match
Setup 1
Nature: Impish
EV spread: Defense and HP
Ability: Big pecks
Item: Lum berry
Moveset:
Tailwind
Double team
Rost
Aerial ace
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the setup here is purely for support, you should buffy allies with Tailwind, after that, keep raising your evasiveness, using Rost when necessary to avoid fainting so you can keep buffing your allies from the start to the end of any battles, if any enemie has lowered your your accurary, raised his evasiveness or used taunt against you, you have Aerial ace for that.
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Setup 2
Nature: Bold
EV spread: Defense and Speed
Ability: Big pecks
Item: Kings rock
Moveset:
Tailwind
Double team
Rost
Air slash
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The point here is again buffing up your allies speed with Tailwind, after giving them buff you should raise your evasiveness with Double team, using Rost when your Health gets low, so you can keep buffing your allies from the start to the end. In case your evasiveness is already on max, and your allies are already buffed up, you have Air slash to keep supporting them with disruption, made good use of your speed and Tailwind in combination with Air slash and kings rock to land several Air slash's before your oponent make any action, making them flinch often, while your allies take care of the rest.