Players that participate in local Pokemon League events will be granted access to special Pokemon through the Global Link in the game. Those participating in the current season of competitions will be able to get a Scizor that is able to use Steel Wing and Pursuit.
Players must create a account for the Pokemon Trainer Club and have a copy of either Pokemon Black 2, Pokemon White 2, Pokemon Black, or Pokemon White. Players must also assign their Player ID to their Trainer Club account that will be received after attending a Pokemon League event.
More information on upcoming events and locations can be found here. Competitive Pokemon players will definitely want to check out these events for a chance to get a Scizor.