The code to enter the engine room is 11922911. I found it in my Brady Games Official Strategy Guide. Good luck!
UPDATE: I had the wrong code posted before, but the one above is correct.
There are two versions of Megaman Battle Network 5. I bought the Team Protoman version (it's yellow).
The game is fun because you get to be two different characters, but later in the game you can combine with other characters. The two different characters that you begin with are Megaman and Protoman. Later in the game, Megaman can combine with Protoman, Magnet Man, Gyro Man, Search Man, Medi or Napalm Man.
Megaman becomes Proto Soul, Magnet Soul, Gyro Soul, Napalm Soul, Search Soul or Medi Soul.
The game is hard to beat because you have to beat a lot of viruses, almost nonstop. I am stuck in one area that I cannot beat, the drill area #3 machine. If you can help me, post your tips here.
I will get back to you when I have completed more.
Change is good
