Myrtle

Myrtle was a top-secret army coding device. It was so secret nobody was sure what it looked like, except that it was disguised as a household appliance and would respond to code phrases. It turned out to look like a common fan.

Code Phrases

 * "So how much is that, anyway?" was given to Daphne.
 * "I love you more than I ever loved anyone," was given to Shaggy.
 * "Go ahead, call the police. I dare you," was given to Scrappy.
 * "Patty cake, patty cake, baker's man," wad given to Scooby.