>>29611122If you're going to reference anything you should be looking at the official art or 3D models, not some other person's extremely stylized work. If the point of your sketchdex is to document what the Pokemon looks like, you wouldn't base it off another person's interpretation.
That's like going on a safari to document what a rhinoceros looks like, but instead of drawing straight from the animal you see in the wild, you look at what the natives have drawn on their cave walls.