Ratman

Ratman is a fictional character from the Dead Rising universe. So far he appears in Dead Rising, Dead Rising 2, and Dead Rising: Chop Till You Drop.

Dead Rising
Ratman appears in both Dead Rising and Chop Till You Drop. Colby's Movieland has several posters and cardboard cutouts advertising his latest film. There is also several clothing items and weapons with Ratman branding, such as the rat stick, rat saucer, and an outfit with the Ratman logo on it. Survivors Nick Evans and Sally Mills appear to be fans of Ratman as they are wearing t-shirts with his logo on it.

Dead Rising 2
In Dead Rising 2 Chuck Greene can be seen in a Ratman costume.