The 'Mario's Flat Butt' meme originated following the reveal of Super Smash Bros. Ultimate for the Nintendo Switch, when eagle-eyed fans noticed a significant change in Mario's character model compared to the previous Wii U entry. Specifically, his gluteal muscles appeared significantly flatter, leading to widespread jokes that Nintendo had 'nerfed' Mario’s backside. The meme highlights the often absurd level of detail fans notice in character redesigns and serves as a humorous commentary on cosmetic changes in gaming sequels. It is frequently used to represent any situation where something substantial has been unexpectedly reduced or diminished.