Board Thread:Wiki Discussion/@comment-31960778-20170721040405/@comment-32930821-20170823175711

i think the two people working with W.D.Gaster can be Alphys, who became the new royal scientist after Gaster, and Sans, who has his own secret lab, knows sbout the alteretion timeline (we undertand during the fight in Genocide route)  and uses the Gaster Blaster.