Passcode For The First Door In The Net
When you reach the Classroom Chalk Board Scene your first passcode will be 09. For the amount of Chairs in Lan's Classroom.

Passcode For The Second Door In The Net
When you reach the Classroom Chalk Board Scene your second passcode will be 30. For the amount of History Books that are in the Library.

Ghost Cars
Go to ACDC Town and go to where the cars appear. Go against the edge and wait. Cars will appear to go through you.

Frouds Son
After beating Ice Man go to the gate out side your school. Go left and see a car. Push A like you were going to talk to some one. A kid should roll out. That Frouds son.