Mice squeak when speaking. If a word not in the Toontown dictionary is used, the words will be "censored" by "squeak," "squeaky," and "squeakity." If they use an exclamation phrase, they would make a loud squealing sound. If they say "Owoooo!", they would make a loud shrieking sound.
Mice have two head designs, which may be used to create a toon via Create-A-Toon. They can be created in any color