Yuu

Yuu is a Japanese Super Mario Maker 2 player. He is the second of only seven players to have obtained every costume piece in the game, but he is best known for his Multiplayer Versus achievements, such as:
 * Winning a live tournament organized by Nintendo
 * Being one of only four players to have ever reached a rating of 6600 (iiPK, Wagyatto, and Maru are the others)
 * Holding the record for the highest rating ever recorded (6683)