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Eevee is one of the most popular mons to use inPokemonhistory and it’s not difficult to see why - it’s an adaptable creature, able to evolve into many different forms and serve many roles in your teambuilding plans. Of course, with so many potential evolutions, you’ll need to know exactly how to acquire the ‘eon’ of your dreams.
As time has passed, more so-called Eeveelutions have been added to the Pokedex, requiring more complex and hard-to-find methods to acquire. Some of these methods change from game to game, so it’s important to stay up-to-date with the latest!

Evolving Eevee In Gen 1
The first-generation games are where things are the simplest - there are only three Eeveelutions to contend with and the stones that you must use to evolve an Eevee into them are all easily sourced.
How To Obtain
Vaporeon
Use a Water Stone, which can be bought in the Celadon Dept. Store.
Jolteon
Use a Thunder Stone, which can be bought in the Celadon Dept. Store.
Flareon
Use a Fire Stone, which can be bought in the Celadon Dept. Store.
Evolving Eevee In Gen 2
The second generation of Pokemon games added two new Eeveelutions, Umbreon and Espeon.
Use a Water Stone, which can be obtained from Bill’s Grandfather (all three games) or through rematches with Fisherman Tully in Crystal only.

Fisherman Tully is located on Route 42.
Use a Thunder Stone, which can be obtained from Bill’s Grandfather (all three games) or through rematches with Lass Dana in Crystal only.
Lass Dana is located on Route 38.
Use a Fire Stone, which can be obtained from Bill’s Grandfather (all three games) or through rematches with Schoolboy Allen in Crystal only.
Schoolboy Alan is located on Route 36.
Espeon
Level up an Eevee with over 220 friendship during the day.
In Gen 2, day is 04:00 am to 18:00 pm.
Umbreon
Level up an Eevee with over 220 friendship during the night.
In Gen 2, night is 18:00 pm to 04:00 am.
Evolving Eevee In Gen 3
There are no new Eeveelutions in Gen 3 to be found, but lots of games.
Use a Water Stone, which can be traded for shards on Route 124 (Ruby, Sapphire, and Emerald) or bought at Celadon department store (FireRed and LeafGreen).

Use a Thunder Stone, which can be traded for shards on Route 124 (Ruby, Sapphire, and Emerald) or bought at Celadon department store (FireRed and LeafGreen).
Use a Fire Stone, which can be traded for shards on Route 124 (Ruby, Sapphire, and Emerald) or bought at Celadon department store (FireRed and LeafGreen).

In Gen 3, day is midday until midnight.
In Gen 3, night is midnight until midday.
There isno internal clock in FireRed and LeafGreen, which means you cannot acquire Espeon or Umbreon in these games without trading from Ruby, Sapphire, or Emerald.
InColosseum XD, you will be prompted to pick an evolutionary stone near the start of the game, including those that can turn your starter Eevee into an Espeon or an Umbreon.

Evolving Eevee In Gen 4
The fourth generation of Pokemon games added two new Eeveelutions to the mix, Leafeon and Umbreon. These Pokemon would have location-based evolutionary methods until the seventh generation.
Use a Water Stone, which can be found in the Underground (Diamond, Pearl, and Platinum) or won at the Pokeathlon Dome or from a rematch with Fisherman Tully (HeartGold and SoulSilver).

Use a Thunder Stone, which can be found in the Underground (Diamond, Pearl, and Platinum) or won at the Pokeathlon Dome or from a rematch with Lass Dana (HeartGold and SoulSilver).
Use a Fire Stone, which can be found in the Underground (Diamond, Pearl, and Platinum) or won at the Pokeathlon Dome or from a rematch with Schoolboy Alan (HeartGold and SoulSilver).

In Gen 4, day is 04:00 am to 20:00 pm.
In Gen 4, night is 20:00 pm to 04:00 am.
Leafeon
Level up an Eevee near the mossy rock in Eterna Forest.
Glaceon
Level up an Eevee near the icy rock on Route 217.
Evolving Eevee In Gen 5
No new Eeveelutions in the fifth generation, though you’ll have to be wary of the changing of the seasons if you want an Espeon or an Umbreon.
Use a Water Stone, which can be found in Dust Clouds (Black and White only) or from the Battle Subway or Pokemon World Tournament (Black 2 and White 2 only)

Use a Thunder Stone, which can be found in Dust Clouds (Black and White only) or from the Battle Subway or Pokemon World Tournament (Black 2 and White 2 only)
Use a Fire Stone, which can be found in Dust Clouds (Black and White only) or from the Battle Subway or Pokemon World Tournament (Black 2 and White 2 only)

In Gen 5, day depends on the season. Day starts at 05:00 am in Spring, 04:00 am in Summer, 06:00 am in Autumn, and 07:00 am in Winter. Day ends at 20:00 pm in Spring and Autumn, 21:00 pm in Summer, and 19:00 pm in Winter.
In Gen 5, night depends on the season. Night starts at 20:00 pm in Spring and Autumn, 21:00 pm in Summer, and 19:00 pm in Winter. Night ends at 05:00 am in Spring, 04:00 am in Summer, 06:00 am in Autumn, and 07:00 am in Winter.
Level up an Eevee near the mossy rock in Pinwheel Forest.
Level up an Eevee near the icy rock underneath Twist Mountain.
Evolving Eevee In Gen 6
At the time of writing, Gen 6 is the last time we received a new Eeveelution. From hereon out, Sylveon became a firm fan-favourite.
Use a Water Stone, which can be bought at the Stone Emporium in Lumiose City (X and Y) or traded for shards on Route 124 (Omega Ruby and Alpha Sapphire).
Use a Thunder Stone, which can be bought at the Stone Emporium in Lumiose City (X and Y) or traded for shards on Route 124 (Omega Ruby and Alpha Sapphire).
Use a Fire Stone, which can be bought at the Stone Emporium in Lumiose City (X and Y) or traded for shards on Route 124 (Omega Ruby and Alpha Sapphire).
In Gen 6, day begins at 04:00 am and ends at 18:00 pm.
In Gen 6, night begins at 18:00 pm and ends at 04:00 am.
Level up an Eevee near the mossy rock on Route 20 (X and Y) or in Petalburg Woods (Omega Ruby and Alpha Sapphire).
Level up an Eevee near the icy rock in Frost Cavern (X and Y) or the lowest floor in Shoal Cave (Omega Ruby and Alpha Sapphire).
Sylveon
Level up an Eevee that knows a Fairy-type move that also has at least two levels of affection (gained through Pokemon Amie, not normal friendship).
Evolving Eevee In Gen 7
The Eeveelutions are all quite easy to get in this generation.
Use a Water Stone, which can be bought from Olivia’s shop in Konikoni City.
Use a Thunder Stone, which can be bought from Olivia’s shop in Konikoni City.
Use a Fire Stone, which can be bought from Olivia’s shop in Konikoni City.
In Sun and Ultra Sun, day begins when the device’s internal clock is at 06:00 am and ends at 18:00 pm.
In Moon and Ultra Moon, day begins when the device’s internal clock is at 18:00 pm and ends at 06:00 am.
In Moon and Ultra Moon, night begins when the device’s internal clock is at 06:00 am and ends at 18:00 pm.
In Sun and Ultra Sun, night begins when the device’s internal clock is at 18:00 pm and ends at 06:00 am.
Level up an Eevee near the mossy rock in Lush Jungle.
Level up an Eevee near the icy rock on Mount Lanakila.
Level up an Eevee that knows a Fairy-type move that also has at least two levels of affection (gained through Pokemon Refresh, not normal friendship).
Evolving Eevee In Gen 8
Here is when we start seeing Eevee being compatible with the Leaf Stone, as players wanted for many years.
Use a Water Stone, which can be rewarded for Poke Jobs or found in the wild as a respawning item at the Lake of Outrage in the Wild Area.
Use a Thunder Stone, which can be rewarded for Poke Jobs or found in the wild as a respawning item at the Lake of Outrage in the Wild Area.
Use a Fire Stone, which can be rewarded for Poke Jobs or found in the wild as a respawning item at the Lake of Outrage in the Wild Area.
In Gen 8, day starts at 06:00 am and ends at 18:00 pm.
In Legends Arceus, day lasts from 04:00 am to 17:00 pm using the in-game clock.
In Gen 8, night starts at 18:00 pm and ends at 06:00 am.
In Legends Arceus, night lasts from 17:00 pm to 04:00 am using the in-game clock.
Use a Leaf Stone, which can be found in the wild as a respawning item at the Lake of Outrage in the Wild Area.
In Legends Arceus, there is a mossy rock in the Obsidian Fieldlands you may level up near, but there are also Leaf Stones to use.
Use an Ice Stone, which can be found in the wild as a respawning item at the Lake of Outrage in the Wild Area.
In Legends Arceus, there is an icy rock in the Alabaster Icelands you’re able to level up near, but there are also Ice Stones to use.
Level up an Eevee that knows a Fairy-type move that also has at least 160 friendship.
Evolving Eevee In Gen 9
With its quickly-cycling day and night cycle, it’s never been easier to get the Espeon or Umbreon of your dreams than in Gen 9.
Use a Water Stone, which can be bought from Delibird Presents after earning three gym leader badges or from certain Tera Raids.
Use a Thunder Stone, which can be bought from Delibird Presents after earning three gym leader badges or from certain Tera Raids.
Use a Fire Stone, which can be bought from Delibird Presents after earning three gym leader badges or from certain Tera Raids.
In Gen 9, day lasts for 36 minutes before cycling to night.
In Gen 9, night lasts for 36 minutes before cycling to day.
Use a Leaf Stone, which can be bought from Delibird Presents after earning three gym leader badges or from certain Tera Raids.
Use an Ice Stone, which can be found on Glaseado Mountain.