This is a switcheroo rip, where the entire song is replaced with the song "6 AM" from Five Nights At Freddy's 2. In the "6 AM - Five Nights at Freddy's 2" rip, it plays the song "6 AM" from Animal Crossing: Wild World.
This is the first reboot rip that doesn't feature any reboot memes. It was the third rip of the event, with the previous two having the Family Guy theme. However, the joke in this rip ended up being important to the Reboot ARGs.