>>27699673If they're going by what happened in reality when mongooses were introduced to Hawaii, no. Yungoos will be diurnal while some rodent Pokemon (perhaps Alolan Raticate?) will be nocturnal, meaning the species they were introduced to control isn't even active during the same hours.
I wouldn't however be surprised if there are references to the Oricorio population taking a hit due to the introduction of Yungoos into the region.
