Pixilart - Protogen Head Base by PlasmaTheProto

Pixilart - Protogen Base by Larzali

Pixilart - protogen mask base by LazzyPest

Editing Protogen Reference Base - Free online pixel art drawing tool - Pixilart

Bases by PlasmaTheProto - Pixilart

Free Protogen Head Base I Made (forgot to crop it properly tho) Im gonna link the Krita file in the comments : r/protogen

Bases by PlasmaTheProto - Pixilart

protogen headbase by EvitaDoodlez -- Fur Affinity [dot] net

Plasma the protogen [COM] PRT2 by oxMUTExo on DeviantArt

F2U! Protogen Base (MS Paint Friendly) by SpartaTheCrazyCanuck on DeviantArt