Sparks gets an updated ref after more than a decade!
Nothing has really changed for him appearance wise, but some details in the old reference no longer apply, especially since it was done in Flash.
Use this reference when drawing Sparks, it's official and you are free to draw him in just about any situation. Alt refs will be coming for the different forms of him, as well as Sparkette. I will also make one for Yarn Emolga :3
