How to Get All Eeveelutions in Pokemon Legends: Arceus

gamespot.com:

Eevee has always been the Pokemon with the most evolutionary potential. They've stayed a fan favorite for decades thanks to their growing number of evolutions, each of which has unique stats, designs, and fighting styles that appeal to all kinds of trainers. Pokemon Legends: Arceus simply marks another game where catching every «eeveelution» has again become a possibility. Naturally, Pokefans want to know how they can evolve their Eevees into the seven existing evolutions this time.

Here's the brief breakdown of how to evolve Eevee into each of its evolutions before we break it down to the details:

There are three main ways to evolve Eevee: evolution stones, friendship levels, or specific locations. Their evolutions cleanly split into one of these three categories. Vaporeon, Jolteon, and Flareon need evolution stones. Espeon, Umbreon, and Sylveon need to be at a high enough friendship level. Leafeon and Glaceon stand out as evolutions that can either use a stone or a specific location, but it's much easier to use the location if you can find it.

Eevee uses evolution stones to evolve into Vaporeon, Jolteon, or Flareon. It can evolve into Leafeon and Glaceon with their respective stones too, but Eevee can reach these evolutions through alternate means.

Pokemon Legends: Arceus offers many ways to farm for evolution items. However, for a Water, Thunder, or Fire Stone, the easiest way to find them is through breaking Tumblestone ores. These ores apparently have a small chance of containing a Water, Thunder, or Fire Stone depending on the color.

Some ores sparkle. These typically contain Stardust, but they don't necessarily mean the ore will contain a stone. In fact, even non-sparkling ores can give you Stardust and evolution