Shy Guy first appeared in Super Mario Bros. 2 in 1988, adapted from Doki Doki Panic, as a masked enemy working for Wart. The character later became a regular in Mario Kart, Mario Party and Yoshi games, known for different coloured robes and a quiet, hidden personality. Short vocal clips of Shy Guy spread through gaming videos and soundboards in the 2010s, where the wr wrwrwr noise was isolated as a standalone reaction. Its brevity and odd, masked mumbling made it easy to reuse far beyond Nintendo footage.