There is a written solution at the related question below. You recover the Twisted Wizard guide from Greg's locker at school and then click on the TV that he is using as a monitor.
There is a video walkthrough at the related link below.
where is the twisted wizard guide in wimpy wonderland
yes
you beat the game then give twisted wizard to Rowley
in his house just click on the video game screen. the game is twisted wizard.
it is for rowley
click on the TV.
go to BimboUSA.com
you play it
its in Greg's locker
wimpy wonderland
1 second
greg is an his house playing twisted wizard ! LOL!:)