Mighty Man & Yukk was one of the components of the Plastic Man Super Comedy Adventure Show in 1979. Mighty Man was an amalgam of a number of different heroes, including Batman (Mighty's alter ego was wealthy playboy Brandon Brewster), the Atom (Mighty shrank down in size to fight crime), and Blue Falcon (Yukk is Mighty's canine sidekick, but far uglier than Dynomutt---in fact, the two dogs share the same voice actor, Frank Welker). Yukk's gimmick was that his face was so gruesome, he could literally stop a clock, hence the toy doghouse-mask he had to wear 24/7.
Here's a typical Mighty Man adventure, as our intrepid heroes battle Coach Crime, plus "Bad News Snooze":
The closing credits were produced for syndicated repeats after each component was spun off on its own, or at least, that was the plan.
Edit: 10/4/15: Had to change the video, adding a second short. The opening credits to the first short, "Bad News Snooze", and the title cards have been edited to avoid copyright issues.