You shut the front door
You can't open the door. It has no use for completing Wimpy Wonderland
Use it to open the laundry room door at Gregs house.
you open the laundry room door with it in Greg's house.
Open up the locked door in Greg's house.
you open the blinds at Greg's house
Use it to open the door that is to the left of the front door once you enter Greg's house. For information or walkthroughs go to poptropicasecrets.com.
you have to get rowlys joshie membership card and that's how you open it ( !)
You have to use the Joshie membership card you got from Rowley after getting into his house, to open the door to the left in Greg's house. From there, you will find an electricity panel and you can turn his electricity off. He will then leave the house and you can get in :P
He will give it to you to open the jammed door if you sneak into his house and return him the twisted wizard game.
open the curtins in greg's house
Once you have beaten Twisted Wizard, return the CD to Rowley at his house and he will give you a Joshie Club card. You can use this to open the door and turn off the power to Rodrick's room.
Go back to Greg's house and open the blinds.