"K.K. Condor - Animal Crossing" is a high quality rip of "K.K. Condor" from Animal Crossing.
At the beginning, the guitar melody briefly takes on the chord progression of "Sandstorm". At 0:05, K.K.'s vocal melody changes to "Heartache" from Undertale, which continues for most of the rip. At 1:21, K.K. whistles "Dogsong" from the same game.