What is the code to the door on Resident Evil ds?

First of all, it depends on the door your talking about. If it's the one at the mansion, don't worry about it. As Jill, if you wait for Barry to come back with the rope, you get the passcode for the door. The code will automatically be put in so you don't have to worry about it. As for the door with the keypad at the Guardhouse, you can find out the code for Jill/Chris in the double red doors. In the room, there is a pool table in the room. Go towards the back of it and you will see the code. For Jill, 345. For Chris, 1245. As for the triple lock door at the end of the game where you save your partner, you don't have to worry about entering the code for that either. It will automatically be put in.