Thread:MissFitt/@comment-38340983-20190510215743/@comment-25175729-20190918190853

No images from concept art. This is exactly the same thing as recoloring an official render of Sonic the Hedgehog, which most people can agree is wrong.

No images from episode stills. This is exactly the same as taking a screenshot from Sonic X to make a recolor Sonic fan character.

Stock images are an acceptable option, as is just drawing it yourself. Just make sure you actually have permission to use any of the images that are used--many stock bases have restrictions.