A few of the variations of the Gravity Falls Theme Song
I do not own Gravity Falls. All rights to Alex Hirsch and Disney. Music by Brad Breeck.
Some of the videos belongs to:
TheMysteryofGF (SDCC Trailers, Shacktron vs Henchmaniacs w/o original audio, Gravity Paws, Short into, and Weirdmaggedon intros)
EpicSonicFTW (Weirdmaggedon 8-bit)
EarthboundFanBro (Original Theme)