Mumsie appeared in 2023 videogame called Super Mario Bros. Wonder. Mumsie are mummy-like enemies in Super Mario Bros. Wonder that walk along the ground. Their English name is attributed to "mummy", but it potentially also derives from "mumsy", a term of endearment for one's mother.
They are enwrapped in loose cloth that bundles on their head at varying heights, making them visually comparable to Trompettes. Grabbing and pulling the end of the cloth unfurls them until they are ultimately defeated. The height of their bundles determines how long and far the player needs to pull the cloth. If they stop midway, Mumsies resume their prior behavior partially unfurled, sometimes exposing that the interior of bodies are empty cavities. There are otherwise only limited ways to defeat Mumsies. The player character bounces of a Mumsy if they try to stomp it, and they are impervious to tossed fireballs or normal Ground Pounds. They can be defeated by the player character in their Drill form, other enemies, or by crushing platforms.
Mumsies largely only occur in ruin-themed courses and are first encountered in the Sunbaked Desert, where they occur in The Desert Mystery and KO Arena Sunbaked Skirmish. The also occur in the affiliated Special World course Sunbaked Desert Special Pole Block Allure. They otherwise are found in Another Uncharted Area: Swaying Ruins, a course in the Fungi Mines. Apparently, the true identity of Mumsies is unknown, but they are thought to be related to Trompettes due to the similar shape of its head.