>>51236161Humans in Pokémon are INCREDIBLY durable.
The man in picrel not only survives this, but is in no need of medical attention whatsoever afterward.
If you talk to him, he's only concerned that you found Team Rocket's hideout.
I'd wager if you dropped a thermonuclear bomb on the Kanto Region, every structure would be leveled, but everybody (Pokémon included) would get up just fine, and likely be out to catch the new crop of poison types the fallout probably turned itself into.