Niantic officially confirmed changes to egg hatch mechanics: Eevee now hatches from 5 KM egg as we reported yesterday! This is great news as it increases chances for all the other Pokemon in 10 KM range and adds Eevee to the tier where it should be in the first place!
Eevee 5KM, no more Rattata and Pidgey hatches
However, that’s not the only change: Pidgey and Rattata can no longer hatch from 2 KM egg! It means we finally got increased chances to hatch Starter Pokemon and other good rewards.
Here’s the updated Egg chart for quick reference and the official tweet is on the bottom of the article:
The official Tweet that confirmed our initial reports:
Professor Willow has discovered that Pidgey & Rattata no longer hatch from Eggs. He also found that Eevee now hatches from 5 km Eggs only.
— Pokémon GO (@PokemonGoApp) November 3, 2016