Fairly Odd Parents???

I was watching a special episode where timmy wishes tom sawyer out of his book and they go around changing the words in books around but theirs one scene i have been unable to understand when timmy cosmo and wanda run into the three musketeers and wanda says oh no he turned the three musketeers into the three mouse and thats when timmy puts his hand over wandas mouth and says lets go please answer if you know its driving me crazy