Eevee possesses an unstable genetic code that mutates suddenly depending on its environment. Exposure to radiation from different stones triggers its evolution.

Vaporeon underwent a spontaneous mutation-developing fins and gills that allow it to live underwater. It can manipulate water at will.

Jolteon's cells produce weak electrical charges amplified by the static in its fur, unleashing bolts of lightning. Its spiky coat is made of charged quills.

Flareon's fluffy fur releases heat to prevent overheating, though its internal temperature can soar up to 900°C.

Like a plant, Leafeon performs photosynthesis. As a result, it is always surrounded by clean, refreshing air.

To defend itself, Glaceon can freeze its fur entirely, turning its hairs into sharp ice needles.

Sylveon's ribbons emit an aura that soothes hostility, lulling its foes into letting down their guard.

Espeon is fiercely loyal to the Trainer it deems worthy of trust. It is said to have developed precognitive powers to protect them from danger.

Umbreon evolved under lunar radiation. It stalks prey from the darkness, its body rings glowing when it leaps to attack.

It evolved after long exposure to electromagnetic fields and digital data. Its body constantly emits faint electronic sounds.

It floats through the air with a long, serpentine body. It is said to draw power from the setting sun, and a single breath can calm a raging storm.