Snowmania is the fourth planet in MarioMario54321's Super Mario 64 Bloopers movie The Cosmic Crystals IV: Zythurvia on the way to Zythurvia itself. It's a snow planet with two or more regions. One region was where everyone landed on, and the other has a snowman with a Crystal Comet Medal on his head.
For the most part, it's a retextured and flipped version of Cool, Cool Mountain and Snowman's Land. The Crystal Comet challenge was a race against a penguin without cheating. CrazyMario64 won the challenge, as well as the cyan Zyther Crystal.