Galar region is allied with the Kalos region.
Sinnoh region is allied with the Johto region.
Hoenn region is allied with the Paldea region.
Kanto region is allied with the Alola region. 
Kalos region is allied with the Unova region.

Kanto and Alola are struggling. 
Galar and Kalos are currently winning.
Due to resources becoming scarce, wild Pokémon are now more aggressive. 
A majority of healing machines have been destroyed. Meaning Pokémon have to heal naturally or use healing potions 