K.K. Western
From Nookipedia, the Animal Crossing wiki
K.K. Western is a K.K. song that seems convey a remote place in a Western desert. It is upbeat and dark at the same time. Boone, Lucha, Ricky, Claude, Sven, Quetzal and Oxford have this song playing in their houses. This song was featured in Super Smash Bros. Brawl 's Smashville stage as music that may be played when K.K. Slider appears.