Talk:Ro Bin Gizzard Stone/@comment-209.106.160.8-20190430182718/@comment-39240882-20190510200316

"A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. ... Otherspecies use gastroliths as ballast." -wikipedia so that means is a  rock in his stomach with one eye i guess