Okay, so there's this song called "Nothing Can Stop Me" by Midwestern Division. It was a part of their album Ready, Set, Go Vol.3, and this particular song was used in the trailer for Bojack Horseman season 2. I've been trying to find it, but the only video on Youtube that played the song in it's entirety has been deleted. It's not the best song in the world, but I sure do wish I could here it again in full.