Unova is clouds! I always thought it was super cool because I LOVED clouds as a kid and Unova got to be named after clouds :)
Anville Town -
Legit got the coolest cloud, cumulonimbus incus. Basically like these are the badass clouds that create the BEST storms.
Lentimas Town -
Lenticular clouds. Basically like, alien type clouds. IIRC some people thought of them as alien space ships years ago but that mighta just been a rumour.
Nuvema -
Literally just means cloud. The loser of the Unova locations.
aannnd I got tired of writing so here we go!
https://pokemonresearch.tumblr.com/post/40394334168/unova-clouds-explained-p1
Y'all should read this too.
https://en.wikipedia.org/wiki/List_of_cloud_types
Legit I LOVE all these clouds but we see very little of these types other than cumulus, cirrus, etc. So Icirrus and Accumula tbh! Actually no, we haven't seen Cirrus here for a while... mostly in WA. Clouds in Queensland suck guys :( Legit though, different places have different types of clouds, yknow those alien clouds I mentioned? They're like mostly found around high altitudes so nope not here but in really coldish mountain-y areas HELL YEA.
Also if you ever see like these lumps in the sky, that means that Anville Town's cloud is coming (those are mammatus clouds btw!) and y'all should avoid because a big nasty storm is coming. :)
Either way - Unova is the coolest with the cloud names imo!