From left to right-
Tim Burton’s Jack Skellington [The Nightmare Before Christmas]
Sim Gretina’s Dr.Tilt
and Toby Fox’s Gaster [Undertale]
Finish Image is up on tumblr:
http://ift.tt/2fmWiBv
First song is also from Nightmare before Christmas.
the brief transition between songs is Gaster’s theme.
The last song is a shortened version of Undertale – Spooktune (Sim Gretina Remix)