>>39342617Because he posted that during the mario kart tourney last sunday, and no one really gave a fuck, it's an old meme song that kinda trended, and he just covered it, he deleted shortly after because he thought that Pekora had given permission to the fan, but apparently that wasn't the case. I assume he thought that was safe to touch like the "ぺこーらいつもありがとう" joke.
The original song is this:
https://www.youtube.com/watch?v=y3zYkGCdz0AYes, he is a moron, please forgive our retarded boomer.