Polychrome Path is a custom track created by Tara. The concept behind the track is what if Rainbow Road was a starter track and features a simple layout with a split path in the middle of the lap. The track was ported from its Wii counterpart so the author could learn how to make tracks without needing to model a brand new one.
Credits
Brawlboxgaming, for the name suggestion and adding rainbow effect to the chain texture.