Parallel!Geno sans by Jmcchannel / Jmccormic

Fanon Parallel!Geno sans is also made by Jmccormic.

"Is Parallel Geno sans basically Killer sans from Undertale Something New / Unrelated Owen Wings?"

No, killer sans is a cheap knockoff of FadeTale by XDanielAF and Undertale Altarnate Ending by Trojj.