Fuzzy Snowflake Rugs can be found during Christmas inside Capsules obtained from hoards by pixpets with a matching color and WU range. Using a Decorative Item Potion and/or a Item Rarity Excluder of the appropriate grade can increase the chances of finding some.
Trivia
Origin
The Fuzzy Snowflake Rug was added during the Christmas 2019 event on Dec 21st, 2019.[1]