"K.K. Groove-a-Numa ft. Isabelle - SiIvaGunner: King for Another Day" is a high quality rip of "K.K. Groove-a-Numa ft. Isabelle" from SiIvaGunner: King for Another Day. It mashes up the King for Another Day Tournament contenders Nintendo Power and DJ Professor K.
This track is an arrangement of "K.K. Groove" from Animal Crossing: New Leaf in the style of Hideki Naganuma's Sonic Rush work. The arrangement has Isabelle "rap verses" in Animalese. The track also samples "What U Need" from Sonic Rush and Chaze the Chat's gibberish "narration" from SiIva Direct 4.1.2019.
- This rip was given backstory in the MOJO!! post "Old Friends Reunite – Nintendo Power and DJ Professor K Reinterview", where DJ Professor K and Isabelle discuss recording a collab at the Gaylord National Resort & Convention Center.
- A snippet from this track was included in "This is M0st DisturbiNg" five days before the track itself was released.