Snowman

A Snowman or Snowmen are sculptures made out of snow that have appeared as either obstacles or living creatures throughout the Mario series.

Super Mario Bros. 2
In Super Mario Bros. 2, a species of Snowman-like creatures known as Flurries appear as enemies in the game's icy levels in World 4 where they would chase Mario or his friends upon spotting him, although they would often slip on they ice due to their low traction.

Super Mario World 2: Yoshi's Island
In Super Mario World 2: Yoshi's Island, another species of living Snowman known as Dr. Freezegood appear as common enemies in the icy levels, where they are often seen skiing towards Yoshi in an attempt to hit him.

Super Mario 64
In Super Mario 64, Snowmen-like creatures called Mr. Blizzards appear as enemies in Snowman's Land and giant Snowman simply referred to as the Headless Snowman is a resident there as well who is seeking a new body.

Super Mario Galaxy 2
In Super Mario Galaxy 2, numerous Snowman sculptures of Goombas and Bowser appear in the Freezy Flake Galaxy and a giant snow creature known as Sorbetti appears to be some kind of Snowman.

Paper Mario
In Paper Mario, Snowmen play an important role in the area of Shiver Snowfield where they act as the guards of the secret door to Shiver Mountain. The only way to get past them is to bring them a scarf for the scarf-less snowman and a bucket for the hat-less snowman.

Mario Kart series
They appear as obstacles in the Mario Kart 64 course, Frappe Snowland (which re-appeared in Mario Kart DS), and the Mario Kart DS course, DK Pass. When the player collides with one of these snowmen, the player will drop any items they have, and they will be knocked backwards a fair way. In DK Pass, they are much more dangerous, as they can potentially knock the player off the edge. These snowmen are seen to have scarves around their necks.