Flurry

Flurries are snow-like creatures that appeared in the icy regions of World 4 in Super Mario Bros. 2's Subcon. These slippery enemies would run along the ice after Mario, but they had low traction on said ice, and could easily slip off an edge to its doom.

Flurries make a cameo appearance in Super Princess Peach. Here they appear in the background of World 6, Gleam Glacier.

Cartoons
Some Flurries occasionally appeared in The Super Mario Bros. Super Show!, where they spoke, despite not having visible mouths. Also, they work King Koopa here instead of Wart, and one (Flaky) even had a name. Staying true to the spirit of the games, Flurries only ever appeared in episodes that were set in snowy environments, such as the Land of Ice from "The Bird! The Bird!" and the North Pole from "Koopa Klaus".