New Bones - Gaster Blaster Gaster Sans

Before the events of Undertale. . . All was well in the underground. A skeleton named Papyrus was training to be in the Royal Guard and his skeleton brother Sans was part of the Royal Scientist along with their father Gaster.
All it took was one day to change the skeleton family forever.

Undertale belongs to Toby Fox

Disclaimer:
This MY version of how Gaster Sans became Gaster Sans and eventually Gaster Blaster Gaster Sans. This means it is NOT just Gaster Sans.