Rihornior

Diamond / Pearl: It puts rocks in holes in its palms and uses its muscles to shoot them. GEODUDE are shot at rare times.

Platinum +4: It can launch a rock held in its hand like a missile by tightening then expanding muscles instantly.

HeartGold / SoulSilver: From holes in its palms, it fires out GEODUDE. Its carapace can withstand volcanic eruptions.

X / Omega Ruby: From holes in its palms, it fires out Geodude. Its carapace can withstand volcanic eruptions.

Y / Alpha Sapphire: It puts rocks in holes in its palms and uses its muscles to shoot them. Geodude are shot at rare times.

Sword: It can load up to three projectiles per arm into the holes in its hands. What launches out of those holes could be either rocks or Roggenrola.

Shield: It relies on its carapace to deflect incoming attacks and throw its enemy off balance. As soon as that happens, it drives its drill into the foe.

Legends: Arceus: This Pokémon evolved through use of a curious item. Its rocklike hide is composed of a mysterious substance and can withstand a blow from a masterwork sword with nary a scratch.