you open the laundry room door with it in Greg's house.
You have to get the Joshie Club Membership Card from Rowely then use it on the door.
you use the joshie membership card you get from rowley for returning his game
you have to get rowlys joshie membership card and that's how you open it ( !)
you get the joshie membership card of rowley and you get in the washroom and turn off the power... to be continued
Once you get the Joshie Card, you can put it in the slot to open the Laundry Room.
He will give it to you to open the jammed door if you sneak into his house and return him the twisted wizard game.
you have to set the alarm on the car go inside give rowley twisted wizard game.
You use the Joshie membership card to open the lock to the washroom and go in and then you should see a power box on the wall and you shut it off.
rowley gives it to you
You have to turn his power off after you get in the laundry room with Rowley's Joshie membership card, he will drive off so you're free to go into the garage and Rodrick's room.
You go to gregs house and go left to the laundry room :)
you don't you turn off the power in rodricks room with the joshie card and the breaker