so back in the day there used to be a show called Ren and Stimpy. It was created by a guy named John Kricfalusi and was a big deal during its time.
Kricfalusi and Mike Judge (beavis and butthead, office space, etc) are apparently ufc fans and teamed up to make some event ads for the ufc in this particular style. The style of animation in this cartoon is classic Kricfalusi style. If you go check out old ren and stimpy cartoons, you will see that they are similar in look and kind-of insane in an awesome way.