The region is called fecua and is indeed based on spain just like many people speculated.

The evil team is called team bailarin. They are basically a dancer team which make use of dancing pokemon

Regional forms are still here and the gen 4 starters get some
-infernape is like a pinkish red fluffy ape which attacks using its soft fur
-torterra now has a snow tree on his back as well as a snowy appearance
- empoleon is a wrestler which has a penguin mask

Fuecoco evolves into a hot pepper crocodile which uses its spiciness to attack enemies. Quaxly evolves into one of those spanish matadors and spirigatito evoles into a sabletooth tiger which has a bunch of flowers around it

You might wanna catch the regional bug as it will be evolving into a bug dragon scorpion.

The regional bird evolves into a spanish chef which cooks spanish meals.

Tauros is getting a regional form and evolution but the unique thing is that tauro's regional evolution evoles into fecuan bouffalant.

More soon™