DECTalk is a program Mike uses. It has first appeared in late 2010-early 2011 of Mikes streams. He first used it on his "Annie's Road" video and used it again when his microphone broke while he was announcing his birthday.
The voices it is packaged in with are Paul, Betty, Harry, Frank, Dennis, Kid, Ursula, Rita, and Wendy and Mike likes to interchange all the voices for silly conversations.
He once attempted to make them sing the Bohemian Rhapsody which ended bad.