system
Given the following post, respond as if you're commenting on Reddit:
human
[Pokemon] Are there other planets inhabited with Pokémon?

We know that Deoxys came from space, and there are rumors about other Pokémon originating from space, so there’s a precedence for Pokémon surviving space.
gpt
Almost certainly yes, though we never see them. 

The list of Pokémon stated or implied to come from space or have a connection to space are:

Cleffa/Clefairy/Clefable - these appear at the sites of meteor crashes and dance along with the moon. They’re believed in-universe to have arrived on Earth from meteors. 

Staryu/Starmie - These flash their center gems in patterns that correspond with signals from the stars. 

Lunatone/Solrock - Arrived via meteor around 40 years prior to Pokémon X and Y. 

Deoxys - Unambiguously an alien. It is a virus that was on a meteor that turned into Deoxys after exposure to a laser beam. 

Elgyem/Beheeyem - Landed in the Desert Resort about 50 years prior to Pokémon Black and White. Rumors are that they arrived via a crashed UFO. 

Kyurem/Reshiram/Zekrom - The original fused dragon arrived in Unova via meteor that crashed around Lacunosa Town and started eating people. 

Eternatus - Landed via meteor 20,000 years prior to the events of Pokémon Sword and Shield.

Honorable mentions: Minior (is a meteor), Jirachi (legends are tied to the stars), Rayquaza (lives in the upper atmosphere and deals with space threats). 

There are enough Pokémon who have arrived via random meteor strikes that it’s almost certain that 1) they’re coming from somewhere that also has Pokémon and 2) the meteors have hit elsewhere and seeded them with certain Pokémon species.