What was that cartoon the waynes bros made?

The Wayans brothers have created several animated shows, but the most famous one you're likely thinking of is "The Wayans Bros." It aired on UPN from 1995 to 1999 and was a live-action sitcom, not a cartoon.

They did, however, also have a cartoon called "Waynehead", which aired from 1997 to 1998 on UPN. It was a very different kind of show that follows the adventures of an exaggerated, musically talented teenage boy named Wayne.

So, depending on which show you're asking about, the answer is either "The Wayans Bros." or "Waynehead".