Ok the names a bit of a exaggeration, in reality this video is just showcasing SOME of the worst mods I could find made with the mustachioed man in mind. These are all from gamebananas.com which is a mod sharing website where people create ones that you can use in your own games. Of course this is tech illegal so all copyrights are held w NINTENDO yall.

Mod Credits
Super Goomba Odyssey Gavin Gamers
Super Karl Odyssey Recko
Bowser Jr Odyssey B.D. Modder
Headless Mario Mod KapuDaKoopa (Twitter)
No Mustache Mario M&M
Moons Randomize Speed Tamdash
Every Moon Makes You Faster Smallant???
Every Moon Makes You Jump Higher Cookies & Skydorm1
Wario and Waluigi Nickolox Titoshroom
Backwards Levels Mayro
All Bosses at Once BaconFearMC
Thomas the Tank Engine ClippyExpressKing2390
DaBaby Convertable JordanAnimations
Bowsette Nivium
Lego Bowser ........?
Yoshi in BF ChickenFarm
Broken Peach in BF ZXMany