When gathering items at PokeStops, you may find an Egg, which will hatch into a Pokemon as you walk.
Each Egg displays the number of kilometres you must walk for the Egg to hatch.
In general, the more kilometres required, the rarer the Pokemon that will hatch.
There is no way of knowing which Pokemon lies inside the Egg itself, although players can narrow it down to the following four large Egg groups – 2km, 5km, 7km and 10km.
Anecdotal evidence suggests certain creatures have higher chances than others from hatching in Eggs in Pokemon Go.
But there are rarity tiers when it comes to eggs.
In general there are four tiers of rarity across all three egg groups and though the three groups more or less fit into them (2km being common, 5km uncommon, and 10km rare) there is some crossover.
Both 5km and 10km creatures have very rare hatches.
The longer the distance, the higher your chances of a rarer creature, although this is not guaranteed.
Pokemon Go Gen 4 Egg groups:
Kricketot (2km)
Starly (2km)
Bidoof (2km)
Turtwig (5km)
Chimchar (5km)
Piplup (5km)
Buneary (5km)
Shinx (10km)
Riolu (10km)
It is important to note that Pokemon Go Gen 4 characters are being rolled out in waves, so this list will only grow.
Pokemon Go 2km Egg Chart:
Machop (Gen 1)
Shellder (Gen 1)
Cleffa (Gen2)
Igglybuff (Gen2)
Pichu (Gen2) – including Halloween event witch hat Pichu until November 1st
Togepi (Gen2)
Aron (Gen 3)
Barboach (Gen 3)
Luvdisc (Gen 3)
Poochyena (Gen3)
Spheal (Gen 3)
Swablu (Gen 3)
Swinub (Gen 2)
Tailow (Gen 3)
Wailmer (Gen 3)
Kricketot (Gen 4)
Starly (Gen 4)
Bidoof (Gen 4)
Pokmon Go 7km Egg Chart:
7km Eggs are unique as they are only found within Gifts – items you can receive and send to others.
Alolan Diglett
Alolan Geodude
Alolan Grimer
Alolan Meowth
Alolan Sandshrew
Alolan Vulpix
These can evolve into another Alolan Pokémon, so it’s worth hatching two of each if you want of each Form to keep.