Geodude evolves into Graveler starting at level 25 in the main series Pokémon games.

In more detail:

  • In the core games (including recent titles like the Teal Mask DLC for Scarlet and Violet), Geodude → Graveler at level 25 , and Graveler → Golem by trading.
  • This applies to both the regular Rock/Ground Geodude and the Alolan Rock/Electric Geodude; both forms evolve at level 25 into their respective Gravelers, then into their Golems via trade.
  • In spin‑offs like Pokémon GO, evolution uses candy instead of levels, but the stage pattern is the same: Geodude → Graveler → Golem.

So if you’re just playing a standard mainline game and wondering “when does Geodude evolve,” the answer you care about is: level 25. ✅

TL;DR: Geodude evolves at level 25, then you trade Graveler to get Golem.

Information gathered from public forums or data available on the internet and portrayed here.