I still find it hilarious that every time I see Billy Mitchell I think of Peter Dinklage's hilarious character in Pixels although the movie itself wasn't that great.
I don't think so. The film had footage of Steve Wiebe telling his kid he couldn't help with the potty because he was busy gaming.
> "And again, [Mitchell is] not in it much, but when he's in it, he provides enough evidence that the stuff in King Of Kong was not all that fabricated when it comes to his attitude." (35:48.960 --> 35:59.600)
[1] https://soundcloud.com/jimquisition/the-spin-off-doctors-cha...
Not to mention that he cheated and was the villain in reality.
The suspicion was perhaps heightened by the fact most people thought he was a jerk and wanted to see him taken down, except for his groupies who worshiped him.
At this point, it is fairly conclusive that he has cheated in several instances.