Based Spain, China (See Below), Madagascar and Belgium
(Thanks to @Sea_Gull for bringing this map to my attention!)
Edit: Since this used Google data, China is notably missing here, but if a commenter on a random Nintendo fan site covering this is to be believed:
"I'm currently living in China and I can say first hand people LOVE psyduck and slowpoke. they're in memes and KFC toys and everything"
China stay winning.
It's possible maybe they didn't bother searching for Pokemon past that.
Though honestly, I bet even if they had the results probably wouldn't have changed much overall, since I think Gen 1 likely is the most iconic and recognizable to people by a significant margin.
considering half these are just that a name is an actual word in a different language, i doubt at least one country wouldnt have newer pokemon if they included them