Flurry

Flurries are snowman-like creatures that appear in the icy regions of World 4 of Subcon. They first appeared in Super Mario Bros. 2 as enemies and soldiers of the 8 bits. They are named after flurries, which are brief periods of snowfall. They are the first Snowman species in the Mario franchise.

Super Mario Bros. 2
In Super Mario Bros. 2, Flurries are enemies that run along the ice chasing after Mario, Luigi, Peach, or Toad. Like them, they have poor traction on the ice and can slip off of the platform they're on. They only appear in World 4. In the rare instances that they can be led onto non-icy surfaces, such as the bottom of the second tower in World 4-3, they have perfect traction. In the NES version of Super Mario Bros. 2, Flurries are fully white (shown left), while in the SNES version and other subsequent remakes, they have blue feet (shown right).

BS Super Mario USA
In the direct sequel of Super Mario Bros. 2, BS Super Mario USA, Flurries make their return and play the same role as in the predecessor. They only appear in the third world, which is also Subcon's icy area.

Super Mario Advance 4: Super Mario Bros. 3
Flurries make an appearance in Super Mario Advance 4: Super Mario Bros. 3. They only appear in the World-e level Treacherous Halls. There are two of them, one of which can help Mario or Luigi pass through the spiky path via standing on their heads, and get a 1-Up Mushroom and/or an Advance Coin. These Flurries move as if all surfaces are slippery ice blocks to them.

The Super Mario Bros. Super Show!
Some Flurries occasionally appeared in The Super Mario Bros. Super Show!, where they spoke, despite not having visible mouths. Due to Wart not appearing on the show, they work for King Koopa here, and one (Flaky) even had a name. Staying true to the spirit of the games, Flurries appeared only in episodes that are set in snowy environments, such as the Land of Ice from "The Bird! The Bird!", the North Pole from "Koopa Klaus", and one Flurry works with Redcoat Koopa at the Delawide River from "The Koopas Are Coming! The Koopas Are Coming!" Unlike in the game, some of them have arms.

Super Mario Adventures
A Flurry, alongside a Shy Guy and Snifit, attends Bowser's wedding to Princess Peach in the Super Mario Adventures comic.

Trivia

 * Despite being an enemy in Yume Kōjō: Doki Doki Panic, Flurry did not receive artwork in the manual (or a name) until Super Mario Bros. 2. This is also the case for Tweeter and Spark.