Ultra-sun: Geodude that have lived a long life have had all their edges smoothed out until they’re totally round. They also have a calm, quiet disposition.Moon: There are plenty of them to be found along any road. A scholar with too much free time once counted a hundred of them along a single route.Alpha-sapphire: When Geodude sleeps deeply, it buries itself halfway into the ground. It will not awaken even if hikers step on it unwittingly. In the morning, this Pokémon rolls downhill in search of food.
Prof. Lotus' Notes: Geodude is a portmanteau of Geo (a prefix for things linked to the earth), Geode (a type of rock crystal, a link further expanded on with it's alolan form), and dude. Geodude was the very first Rock Pokémon in the Pokedex.