Mega Man Battle Network/Stage 2: NumberMan.EXE & Mr. Higsby

ACDC
While Lan is sleeping, a mysterious man approaches the ACDC elementary school gate. The next morning, Lan is late and runs to school.

School
You will get two new emails: Go south-west through the hall. The first door is the nurse's office and you can pick up a hidden Recov50 G in the medicine cabinet. In the AV room, you can find a hidden Repair A on the teacher's desk. Go up the stairs. In the library, you can find a hidden Escape H in the last book shelf against the wall. Go through the back door of room 5A. Lan will sneak to his desk. Ms. Mari will introduce Mr. Higsby as an assistant for the class. Talk to all the classmates and the bell will then ring. Mr. Higsby will begin class since Ms. Mari is sick in the nurses office. A WWW re-education program will start playing. Talk to Dex and he will try to take on the viruses, but fail. Talk to Mayl and she will give you Roll R. Jack into the blackboard.
 * NetNews - Student Crime
 * Yai - Roll call

School Network 1
Mystery data:
 * ShokWave L

Go past the blackboard until the path splits. On the pencil path you can find a mystery data containing a ShokWave L. Take the other path and eventually you will find the path to School Network 2.

School Network 2
Mystery data:
 * 800z

Follow the path and go north-east to pick up a mystery data containing 800z. Go back to through the other path, which will take you back to School Network 1.

School Network 1
At the end of the pencil path you will encounter a door that is passcode protected. The passcode hint is the number of chairs in room 5A. As Lan count the number of chairs in the classroom. The answer is nine. Press to tell MegaMan the number of chairs. Press or  to scroll the numbers and press  to confirm. The door will open. Continue past the classroom and blackboard and go through the portal to school network 2.

School Network 2
Continue going forward until you get to an intersection. The south-east path leads to a mystery data that contains a HiCannon I. The north-east path will lead to another locked door. The passcode hint is the number of volumes of History of the World. As Lan exit the classroom and go through the hallway until you get to the library. In the library, go examine the first bookshelf in the west corner of the room. The answer is 30. After you unlock the door keep going until you get to another locked door. This time the passcode hint is none. The passcode is a random number and you get five tries to input the correct number. If you do not get it in five tries, the passcode resets. After each entry, you will be told if it is too high or too low. Also, you will be told if any digit is correct. Continue past to school network 4.

School Network 4
The mystery data at the end of the path contains 400z. Continue on the path to school network 3.

School Network 3
Skip the first locked door and go to the second one. This one also has no passcode hint meaning you have to guess the number again. After you unlock the door, you will find a mystery data containing a HPmemory in the corner. Go back to the first locked door you skip. This door's passcode hint is the number of doors in the school.