Let's take this seriously though.
Round 1:
Mask just mindhaxes Gearsper, Mumen Rider, Captain Mizuki, Needle Star, Wild Horn, Chain'n'Toad, Shadow Ring, Narcisstoic, Spring Mustachio, Golden Ball, One-Shotter, Lightning Max, Great Philosopher, Stinger, Death Gatling, Bushidrill, Okamaitachi, Iaian, Pri-Pri-Prisoner, Tanktop Master, Genos, Flashy Flash, Watchdog Man, Darkshine, Pig God, Drive Knight, Promoted Rook, Zombieman, King, Metal Knight, maybe Child Emperor, Atomic Samurai, Bang, Tatsumaki, Rosie, Evil Eye, Gigakigan, Withered Sprout, Choze, Piggy Bancon, Messenger of the Seafolk, Three Eyed Ghost, Electric Catfish Man, Personification of a Light Pull Chord, Sludge Jellyfish, Maiko Plasma, Kombu Infinity, Crablante, The Three Crows, Raffleseidon, Giant Crow, Face Ripper, Demonic Fan, Jumping Spider, Showerhead, Unihorn, 170,000-Year Magicicada Nymph, Hundred-Eyes Octopus, Grizzly Nyah, Devil Long Hair, Eyesight, Vaccuma, Rhino Wrestler, G5, G4, Senior Centipede, Mosquito Girl, Armored Gorilla, Beast King, Deep Sea King, Royal Ripper, Pureblood, Bug God, Awakened Cockroach, Beefcake, Hellfire Flame, Gale Wind, Phoenix Man, Gums, Fuhrer Ugly, Nyan, Evil Natural Water, Homeless Emperor, Elder Centipede, Gouketsu, Overgrown Rover, Black Sperm, Bakuzan, Groribas, Melzagald, Geryuganshoop, Carnage Kabuto, Vaccine Man, Psykos, Orochi, Lord Boros, Genoboyle, Daichi Oogami, Himiko, Hammerhead, Speed-o'-Sound Sonic, Suiryu, arinki's Private Squad, and Bomb, sending them all out of the fight in a conga line.
The ones that do attack him after that mostly get one-shotted by physicals or hax, being Fubuki, Sweet Mask, Metal Bat, and Do-S. He BFRs the meteor into the Shadowland. Only Saitama, Garou, Blast, are left and they blitz him before this madness can continue any further. But Mask just regenerates and no matter how hard they try, they just can't get rid of him and Mask can't get away because of the speed. It goes into incon until God comes down, goes "**** this" and takes away his powers and kills him for good.
Round 2:
This time, it's different. Everything is the same except Saitama, Garou and Blast get caught up in the mindhax as well. God comes down... and gets mindhax'd too. Mask leads them all away, winks to the camera and says Ssssssmokin'! And One-Punch Man verse has been solo'd.