--Video and Audio editing tools showcase that Mitchell's video records are altered and even outright made into different cuts
--Yellow Cards, such as no audio from a video of a record, during a developmental Arcade platform emulator for arcade games that didn't have sound support, while also claiming he used no such emulator (M.A.M.E.)
--Ties with Todd Rogers who was previously caught cheating, and lost his Guinness World Record
--Donated to Twin Galaxies, a site mentioned in the previously linked videos with Todd Rogers, and had huge ties and was essentially their right hand
--According to higher ups, threatened them. What these threats are are unknown, but assumed to be pulling out the money
--Video footage from people proving that he has faked many more things such as swapping out Arcade Boards and also outright being proven to be using M.A.M.E.
--The only person who has ever seen evidence of him getting a WR in person is the aforementioned Todd Rogers
For those in the unknown, Billy Mitchell is a person who has been notorious for being an amazing Donkey Kong player, or so we think, with points that get high up into the millions. He's apparently so good, that he managed to get a documentary about himself. Unlike Todd Rogers who has outright lied about points, with obvious lies, and the only person to back him up as a referee is now in jail for raping a minor (that's not a joke either), Mitchell has had legitimate scores, however, people have started to accuse him of using M.A.M.E., an arcade emulator. Assumptions were made with a video where he uploaded a new high score but with no sound, and M.A.M.E. at this time had no reliable sound support. People noted that M.A.M.E. loaded from top down instead of bottom up like an actual arcade, and found that Mitchell's vid was doing as such.
Mitchell is also a bit of a cow (or at least, is probably gonna get up there), since he doesn't like anyone getting in the way of his fame. He sued Cartoon Network for his likeness in an episode of Regular Show, where a Billy Mitchell lookalike loses to Mordecai and Rigby in a motocross/Excite Bike looking game. He lost due to parody laws. He also doesn't like it when people bring up the cheating allegations in person or online.