The Smash Ultimatum (2022)

An ordinary day in the world of Garry's Mod for our favorite plumber, Mario. Up until he suddenly remembers something. He needs to send a "Smash Bros. Invitation" to a certain someone by tomorrow. On his way to deliver the letter, however, a new challenger approaches. Mickey Mouse. and he's trying to stop Mario from delivering the invitation. It's all up to him to send the letter and to not let Mickey get in the way.