"Super Smash Bros. Melee" is a mistagged artist.
The soundtrack is composed by Hirokazu Ando, Tadashi Ikegami, Shogo Sakai and Takuto Kitsuta and contains mostly remixes and re-interpretations of classic Nintendo songs and character themes from assorted games.
“Super Mario Kart” is not an artist. The tracks in this game were composed by Soyo Oka and Taro Bando (Soyo Oka, Taro Bando). If this non-artist appears in your charts, do last.fm and yourself a favor.