Spoilers: Genocide, and Final Bosses included
Features a medley of all Undertale Bosses, excluding mini-bosses and secret bosses. Thank you for your feed back, let us know if you wish to see more like this!
Credit to RubixCraft for the awesome colored Sans sprite, go check out his work!
http://rubixcraft.deviantart.com/art/Sans-Colored-589431815
CHAPTERS:
-Pacifist/Neutral Route
0:00 Toriel: Heartache
1:48 Papyrus: Nyeh Heh Heh!/Bonetrousle
4:16 Undyne: Spear of Justice
6:10 Mettaton: Metal Crusher
7:12 Muffet: Spider Dance
8:52 Mettaton EX: Death by Glamour
11:05 Asgore: Bergentruckung
11:21 ASGORE
-Genocide Route
14:01 Undyne the Undying: Battle Against a True Hero
16:36 Mettaton NEO: Power of NEO
-Final Bosses
17:07 Omega Flowey: Your Best Nightmare
20:35 Omega Flowey: Finale
22:11 Asriel Dreemurr: Hopes and Dreams
25:10 Asriel Dreemurr: Save the World
26:48 Sans: Megalovania