Vikerkaar, formerly KOSSismoss, is a Super Smash Bros. Ultimate Mii Swordfighter and Banjo & Kazooie main in Western Washington. Early on in Ultimate's metagame, he was considered the best King K. Rool player in the world, notably by being the first player to place well in tournaments with King K. Rool. He is currently ranked 5th on the Western Washington Power Rankings.
In Smash 4, KOSSismoss was a Northern California and Washington Mr. Game & Watch main who was regarded as the best Mr. Game and Watch player in the United States, and one of the best in the world alongside Regi and Maister. He has wins over notable players such as VoiD, Xzax, Sho, Ito, Trevonte, Cacogen, Konga, falln, and many more. He was ranked 3rd on the Western Washington Smash 4 Lifetime PR.