I saw what was underneath. Evidently, Grievous may be "cuter" with his mask on. Being a kid's show, The Clone Wars wouldn't show it D: (some are inclined to believe he still has a mouth under all that, all the better to bite Dooku's ear with) Ack, my editing is a little slow. According the wikipedia article, Kroenen's mechanical additions were a result of him being killed and then being brought back to life, which is more like Grievous' old backstory. Maybe the author of the article was being selective.