In these books, sometimes Harry is rewarded for breaking rules or he's punished.

So if you've bought all the better games in the world (quite a few, in my opinion), you're so strong a Harry Potter

You collect and trade wizard cards to improve Harry's strength

In these books, sometimes Harry is rewarded for breaking rules or he's punished.

Sometimes it gets the characters wrong, such as having Draco give Harry a prize for beating him when Draco is a sore loser.

You collect and trade wizard cards to improve Harry's strength