1. You haven't unlocked the ability to move it yet: Some boulders require a specific item or move to be removed. For example, you might need the Strength HM to push boulders out of the way. Make sure you've obtained the necessary item or move.
2. It's a story-related obstacle: Some boulders are intentionally placed to block your path and are part of the game's story progression. You might need to complete a specific task or achieve a certain point in the story before they can be moved.
3. You're missing a key item: Occasionally, a key item is needed to remove a blockage. This item could be a specific tool, a special pass, or something else entirely. Check your inventory and the surrounding area for potential items.
4. It's a glitch: While uncommon, it's possible that a glitch has prevented you from interacting with the boulder. If you've tried everything else, consider saving your game and restarting the game to see if the issue resolves itself.
Here's what to do if you encounter a boulder you can't move:
* Check your inventory: Do you have the Strength HM, a relevant item, or any other tools that could help?
* Talk to nearby NPCs: They might provide clues or hints about how to move the boulder or might have the item you need.
* Explore the surrounding area: Look for other paths or areas that might lead you around the obstacle.
* Check online guides: Websites like Serebii or Bulbapedia can offer detailed information about specific locations and obstacles in the game.
Remember, don't give up! With some persistence and a little detective work, you'll be able to overcome the boulder and continue your journey.