Who's Mikey?

Dick Christy of In-Sync Publications says:

"He's the voice on my phone or the beep on my fax... From all the stories that we have run in In-Sync, and all of the stories he's told me, he must be two hundred years old. When I deliver our paper, people will grab it, look for his article, read it, laugh, and tell me that's all that they were looking for.
"So who's Mikey? He's a cowboy, a camera man, a secret agent, a soldier of fortune. Or is he the little boy from the TV commercial? No, he is simply Mrs. Hirsch's little boy, Mikey..."