Red / Blue: Its genetic code is irregular. It may mutate if it is exposed to radiation from element STONEs.
Yellow: Its genetic code is unstable, so it could evolve in a variety of ways. There are only a few alive.
Gold: It has the ability to alter the com position of its body to suit its surrounding envi ronment.
Silver: Its irregularly configured DNA is affected by its surroundings. It evolves if its en vironment changes.
Crystal: Its ability to evolve into many forms allows it to adapt smoothly and perfectly to any environment.
Ruby / Sapphire: EEVEE has an unstable genetic makeup that suddenly mutates due to the environment in which it lives. Radiation from various STONES causes this POKéMON to evolve.
Emerald: An EEVEE has an unstable genetic makeup that suddenly mutates due to its environment. Radiation from various STONES causes this POKéMON to evolve.
FireRed: An extremely rare POKéMON that may evolve in a number of different ways depending on stimuli.
LeafGreen: Its genetic code is irregular. It may mutate if it is exposed to radiation from element STONES.
Diamond +2: A rare Pokémon that adapts to harsh environments by taking on different evolutionary forms.
Platinum +2: Because its genetic makeup is irregular, it quickly changes its form due to a variety of causes.
HeartGold / Sword: It has the ability to alter the composition of its body to suit its surrounding environment.
SoulSilver: Its irregularly configured DNA is affected by its surroundings. It evolves if its environment changes.
Black 2 +3: Thanks to its unstable genetic makeup, this special Pokémon conceals many different possible evolutions.
Omega Ruby / Alpha Sapphire: Eevee has an unstable genetic makeup that suddenly mutates due to the environment in which it lives. Radiation from various stones causes this Pokémon to evolve.
Sun: Possessing an unbalanced and unstable genetic makeup, it conceals many possible evolutions.
Moon: Current studies show it can evolve into an incredible eight different species of Pokémon.
Ultra Sun: The question of why only Eevee has such unstable genes has still not been solved.
Ultra Moon: Its genes are easily influenced by its surroundings. Even its face starts to look like that of its Trainer.
Let's Go Pikachu / Let's Go Eevee: It can evolve into a variety of forms. Eevee’s genes are the key to solving the mysteries of Pokémon evolution.
Legends: Arceus: Harbors the potential to evolve into manifold forms. Within Eevee lies the key to the mysteries of Pokémon evolution—I'm certain of it.
