Rainbow Road is the final track in the final cup of Mario Kart 8. It's been that way for Mario Kart's entire history. Each version of the circuit track has been loopy, insanely colorful, and disorienting—with music to match.
YouTuber TheEternalSushi has combined eight of the title songs from past and current versions of Rainbow Road into one triumphant-sounding and appropriately zany mashup that you can listen to up top. Trust me, it plays better than it sounds in theory. And it gives a fun glimpse into how Mario Kart's music, like many things Nintendo-related, has gradually changed over the years while still remaining close to its roots.