To play in the World Cup, you must defeat all three other teams with one team.

To play in the place where they first invented Quidditch, called Queerditch Marsh, win the Quidditch World Cup with any country. You can play multi-player or against the CPU.

At the beginning of a match, hold the Left Analog-stick Up/Right to start out with possession of the Quaffle, making it easier for the first score. Usually making the first score assures that you will win the match as long as you follow the other scoring tips.

When hitting a Bludger, make the Bludger go directly in front of the other team's Chaser that has the Quaffle. Then move the Analog-stick Down and in a few seconds the Bludger will hit the Chaser; and you will have possession of the Quaffle.

To fake out the keeper, wait to go up to the hoops until you get a Dodge. Once you get the Dodge, go to one of the side hoops. The keeper will then get there very fast. When they reach that hoop, use your Dodge to get to the other side hoop, and while you are passing the hoop, throw the Quaffle.
To get more Quidditch Cards, play the Challenges and beat the Team Record.Win matches, each with a different team, in the Hogwarts or World Cup.

To acquire almost anything, you must first collect Quidditch Cards. To unlock the best broomstick, the Firebolt, you must collect 50 Quidditch Cards.

If you want a really fast broom and play dirty team specials, choose Slytherin. They have Nimbus 2001 brooms and their special gets you 20 points. Japan has Firebolts, but does not have a strong team.

Get a Bludger, then use it. When the Bludger screen appears, control it all the way left then hit the Chaser. You will see him lose control of his broom and fly straight into the wall. This is only temporary.

The best team to pick for Hogwarts is the Ravenclaw team. The Ravenclaw team has a Team Special Move that allows to get 30 points.

When someone shoots a Bludger, turn around so your Beaters are in front of you. The CPU will run the Bludger directly towards your Beaters and they will just knock it away. This works almost all of the time. If it does not, you probably turned around too late or your Beaters did not get in front of you in time. This will even works on the Firebolt level.

After you shoot a Bludger at someone, press Away and it will hit the person almost every time.
Hold L1 + R1 while pressing X to make combo passes. However, pass quickly or it will not work. Then, use L1 and R1 and make a shot while holding one of those buttons to finish your combo. This will give you Bludgers faster.