who is the professor?!?!?!?! if your talking about Gary hes usually come when there are parties that include lots of mechanical gears like the 2010 Halloween party the member only rooms had loads of machiney stuff he appered a few times
First, you need to have a membership and buy a rad scientist costume. Second, you have to go to the Book Room and click the green candle.
at the sports shop go to the dressing room and go inside it and your there
Secret lab
you follow gary around Club Penguin to his lab
HALLOWEEN
in the draw
its in garys lab
you dont open it your self G opens it for you.
itis in city hall
its in a cave in the puffle wild
in the draw
Go Into P.S.A Missions And Pick One With Gary`s Lab In It!
in the forest down the lader
in the Hq lab
sports shop ski village