Well it is not really a cheat, but fun anyway.

Go to Pajama Place
Go to Shop called "Talking in Your Sleep"
--'Voice Training'.
Now say: "Would you like some help?" to the shop clerk. You will receive a new item under "Emotions" called the Resitence Salute.
Now you can say "Toons of the World Unite!"

Done -

Does anyone have any other good stuff?