Check the house south from the pokemart.
Ruby sapphire locked door.
If you scan a berry go to norman to receive it.
Seen that locked door in pokemon alpha sapphire or pokemon omega ruby.
Talk to the old man standing in front of the door.
To unlock the door in the old man s house in mossdeep city you need to scan junichi masuda s secret base qr code.
You will have to scan the card.
Once you scan it you will be able to enter the locked room in the old man s house which is junichi masuda s secret base.
It s gonna be a doozy.
Head up stairs on the west side of sootopolis until you find steven and wallace.
The first time you visit sootopolis all the doors will be locked except for the pokemon center and poke mart.
The trainer you scanned will be waiting in the center of the room.
If you haven t it s located in mossdeep city.
The door that was locked will now be open.