Unlocking Items
By winning Seeker, Passing, shooting, tackling, and Bludger challenges you will unlock extra items. By winning Quidditch World Cup matches you will unlock team photos, stadiums, logos, and special moves.
Strategy
Stay in front of your opponent as long as you can and pick up every boost which is dropped. Also try to stay 160 points ahead of your opponent at all times so that if your opponent catches the snitch (150 points if grabbed) you will still win the game.