Below the Belt is a single-player event match in Super Smash Bros. for Wii U. In it, the player controls Mario, and must protect Little Mac, who is at a level of damage depending on the difficulty, from a giant Wire Frame Little Mac in a one-stock match. The regular Little Mac is in a permanent crouching position, meaning he cannot help Mario, and the event will result in failure if he gets KO'd.
- Left path: Awards the Yellow Pikmin trophy. Leads to All-Star Battle: Melee.
Completing the event on hard difficulty within 60 seconds awards 2000G.
- This event is similar to Melee's Event 19: Peach's Peril and Brawl's Event 31: The Ultimate Bodyguard where the player must defend a helpless ally.
- Mario's role of defending the damaged Little Mac is a reference to his cameo as the referee in Punch-Out!!
- Mario also uses his Fire Mario costume, referencing his referee outfit in Punch-Out!!