In the West we are used to seeing people of a certain caliber become ambassadors in their fields, whether they are sporting or administrative. In Japan no, there they love video games, anime and manga and therefore the protagonists of these works are seen as real people.
So if we see Goku appointed ambassador of the Tokyo 2020 Olympics, it should not be surprising to see Geodude have the title of tourism ambassador.
The prefecture of Iwate in Japan has in fact collaborated with The Pokémon Company and the choice fell on the first generation Pokémon rock since Iwate's kanji translates to "rock" and "hand".
Obviously we didn't limit ourselves to this, but Geodude now also has its own official song:
A truly curious choice, which once again demonstrates how Pokémon in Japan are indeed a cultural phenomenon, as well as video games and merchandising objects.