Poké-POWER: 

Once during your turn (before your attack), if Nosepass is your Active Pokémon, you may flip a coin. If heads, switch 1 of your opponent's Benched Pokémon with 1 of the Defending Pokémon. Your opponent chooses the Defending Pokémon to switch. This power can't be used if Nosepass is affected by a Special Condition.