You can get Sylveon by using 25 Candies and earning 70 Hearts when Eevee is your buddy Pokémon. If you have enough Candy and Hearts acquired, a silhouette of Sylveon will show up.

Eevee Evolution Box | Pokémon Center Official Site

Sylveon's battle potential is on par with Vaporeon and Jolteon, but it ranks higher than them, thanks to its absolutely fantastic shiny form. Swapping out its pink for blue (and bits of blue for pink), Sylveon's shiny is a standout that perfectly matches its normal coloring. The two together are really great. Flareon is a decent Pokemon to have when you need a Fire-type, but it pales compared to others, like Moltres, Heatran, Entei, Reshiram, and more. It doesn't have access to a fantastic array of moves, either. However, since it isn't a Legendary, it can be much cheaper to power up a Flareon than many of the top Fire-types.

Eevee must be set as a buddy before the evolution. After making sure all criteria are met, evolving during the day will get the trainer a Psychic type Espeon, while Dark type Umbreon will make its appearance at night time in the Pokémon GO app. Shiny Leafeon is more than a little subtle. The colors become a bit darker and more vibrant, which is a nice differentiation from the normal manila-yellow that so many Pokemon are. However, it's really almost unnoticeable, making it pretty underwhelming. How To Get A Shiny Leafeon Vaporeon, Jolteon, and Flareon are random evolutions, with no special conditions required. An Eevee will evolve into one of these forms if none of the conditions for other evolutions have been met. Each evolution costs 25 Candy. PvP is another matter, as it doesn't shine in the big leagues. The Ultra and Master league is littered with intimidating opponents, including powerful shiny legendary Pokemon like Giratina and Groudon. Glaceon is pretty solid, but Ice isn't great defensively, and Glaceon doesn't have a lot of bulk. Sylveon can be obtained by earning 70 Hearts with Eevee as your buddy Pokémon and spending 25 Candy.

Eevee Evolutions | Pokémon Center UK Official Site Eevee Evolutions | Pokémon Center UK Official Site

Leafeon and Glaceon are obtained by evolving your Eevee under a Mossy Lure (for Leafeon) and a Glacial Lure (for Glaceon).

Flareon is boosted by sunny weather, which is good to note if you’re trying to battle with your shiny Eevee evolutions. Regarding appearance, the shiny Flareon is mostly just a muted version of the original. The coat is a more gold-tan color than the brighter orange and red that the original has. How To Get A Shiny Flareon As for shiny Glaceon's design, the Ice-type isn't winning any awards, but it is very pretty. It's probably one of the most subtle changes on the entire list of shiny Eevee evolutions, swapping out the teal for a slightly bluer and lighter color. It definitely looks icier in its shiny version, so that's nice. How To Get Shiny Glaceon