There was a trackmania player called riolu who had a lot of records, over 200, in different trackmania games. In 2021 it was discovered that he cheated most of them

Riolu was a prominent Trackmania player who was caught cheating by slowing down his game to drive mor accurately.

https://liquipedia.net/trackmania/Riolu

As the others have said, riolu was the biggest cheater in the game with hundreds of cheated records all done with 50% speed. Has had a dozen accounts and even drove official author times for nadeo official campaign maps.

If you want to know more about it wirtual made a great documentary. https://youtu.be/ox6zF48YXkQ