Are you really sure this is... Gaster? This is for 11th March when I found my flipnote animation "Killer PV", which I never continued it ever since I stop using my Nintendo DSi XL. I was planning to draw them resembling Spike and Yasu from my original series' universe or relating the deadly sins, wrath and envy but... I didn't want my original content to merge with their universe, yet . Anyway, the chibi version of Gaster is their (missing) mascot while Nightmare-Kat is my original mascot from my own killing game inspired by Danganronpa and Zero Escape series before discovering scifell exists and creating UnderDespair instead.