Umbreon, also known as UmbreonMow, is a retired professional Melee and Project M player from Pennsylvania. Prior to his retirement from Melee, he was one of the game's early top players for low tiers. Umbreon returned to tournament play for Project M as a notable Sheik and Marth player.
He was the leader of the governing body of the Melee community, the Melee Back Room (MBR), from 2007 through 2011. Umbreon is known to have developed heuristics for high-level play optimization and coaching work with other known community members such as Cactuar, Kirbykaze, druggedfox, Mew2King, and PPMD. Umbreon is also known for extensive writing with regards to top-level Marth play and as the author to Drastic Improvement. Finally, he was a member of the Project M Development Team until its completion in 2015, and later a member of the Project+ Development Team.