Niantic has announced the September 2020 Research Breakthrough amid widespread complaints from Pokémon GO trainers that these Breakthroughs used to lead to encounters with Legendary Pokémon However, it seems that players are finally, generally, satisfied with the monthly Breakthrough choice which, for September, with be Alolan Raichu.
Alolan Raichu is September 2020's Pokémon GO Research Breakthrough[...]