"Swan Lesson - Super Smash Bros. UItimate" is a high quality rip of "Swan Lesson" from Super Smash Bros. Ultimate.
Jokes[]
The advertised track is mashed up with "Blue (Da Ba Dee)", with parts of the advertised track arranged to match. At 0:34, "Showtime (Original Mix)" from Homestuck is briefly added to the mashup. After 1:33, the vocals of "Blue (Da Ba Dee)" are absent. At 2:04, the melody changes to the My Little Pony: Friendship Is Magic theme song.