Question

For Sword and Shield, do specific overworld Pokemon spawn only once?

Comments

As far as I can tell, all of the overworld encounters in the wild area almost always stay the same and can be re-encountered indefinitely. The only ones that seem to change are the weather dependent ones, but they are always in the same place if the weather matches. I don’t know about routes, and may not be 100% correct. : P

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there's a few that spawn only once a day. Like at Lake out Outrage, you can get 1 Eeveelution a day, but other than that I don't really know

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No, I don't think so. I've caught all the Overworld Pokemon in my Pokemon Sword game and they're always still there. However, this means that I have  ton of Kommo-o now!

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No Pokemon in the overworld spawns once they will respawn in the wild area too because of the weather

Answer 1

when you encounter the overworld Pokemon and defeat it, catch it or run away, you will not be able to encounter it for 3 days. when the 3 days are up, it will spawn. this goes for the counterpart to that mon. example, overworld clefable will go away if you defeat the overworld ribombee