The party is going to grow for Pokemon Day in Pokemon GO!
Some changes have been made to the Pokemon Day Celebration in Pokemon GO. This is regarding to the Party Hat Kanto Starter Pokemon. Originally it was announced that these Pokemon were going to be exclusively found in 7KM Eggs. It has recently been changed on the Pokemon GO Blog page for the event that these Pokemon will now be found in One Star Raids.
There has been no word on why this change was made. This could have something to do with recent fan outcry regarding how many events recently have been using the 7KM for exclusive Pokemon. Every event since the start of this year has utilize the 7KM to distribute Pokemon. The problem with this method is that what hatch from the eggs are random and doesn’t guarantee getting the Pokemon that are wanted.
Either way, hopefully this change in the upcoming Pokemon Day Celebration will make it easier to find the Party Hat Kanto Starters. The Pokemon Day Celebration event will start in Pokemon GO on Tuesday, February 25, 2020, at 1:00 p.m. until Monday, March 2, 2020.
Source: Pokemon GO Blog