After the events of Mario Meets Movie Mario, the Mario Bros are chilling at their home, having a good day off, then Movie Bowser tricks Movie Sonic when telling him that Movie Mario is the bad guy who needs to be stopped. So the two video game characters meet for the first time but not a chat, a FIGHT.
Special thanks to my good friend @Ninjarlos once again for playing as Movie Mario, please subscribe to his channel! He's a great guy hanging out with!