Shuckle

Shuckle (Japanese: ツボツボ, Tsubotsubo) is a dual-type Bug/Rock Pokémon introduced in Generation II. It is renowned for having the highest base Defense and Special Defense stats of any non-legendary Pokémon. Shuckle resembles a small yellow turtle with a hard, red shell featuring many holes. Rather than actively foraging, Shuckle collects Berries and stores them in its shell, where they ferment into a juice that it consumes. It also uses its digestive juices to dissolve rocks, creating hiding places. Shuckle's main abilities are Sturdy and Gluttony, and its hidden ability is Contrary. It has appeared in the anime and manga, often shown as a maker of Berry juice. Its design may be based on endoliths, organisms living in porous rocks or shells, as well as barnacles due to their hard shells and attachment to rocks.