You know, it's really funny to me how every time there's a match of Donkey Kong doing good that's going on at the moment, the person is recording something else, like Meta Knight V.S. Sonic (something we've seen ten thousand times!). Does anyone happen to know of any videos where Donkey Kong wins a match? Probably not. I don't even think there is a 1 on 1 match of Donkey Kong playing.
If you look in the video that Gimpyfish62 posted, you'll notice near the beginning, that the camera drifts off to the right screen for a couple of seconds. There's a match with Donkey Kong fighting, and it looked like he was doing very well. Why couldn't people record any of those matches? Honestly, it's like everyone hates Donkey Kong these days...