Why did my Eevee lose its Hidden Ability when it evolved?

I got a hidden ability shiny Eevee from the GTS, and I evolved it into a Vaporeon. But, it lost it’s hidden ability! Can someone please tell me why?

Pleaselog inorregisterto add a comment.

The only way a Pokémon can normally change its Ability is upon evolution. The “slot” storage system means that if an unevolved Pokémon has the “first” Ability for its species, it will have the “first” Ability of its evolved species upon reaching this stage, even if this Ability differs in the evolved species. In other words, a Poochyena with Run Away would evolve into a Mightyena with Intimidate, while a Poochyena with Quick Feet would evolve into a mightyena with quick feet

If you have the hidden ability, it will have the hidden ability upon evolution. If it has the first ability, it gets the first, if it has the second, it gets the second. However, it doesn’t keep eevees anticipation, but it gets vaporeons hidden ability, hydrationhope I helped:Dsource

Like dr dude said in his answer a Pokémon with it’s Hidden Ability should still have the Hidden Ability of the Pokémon it evolves into.

Are you 100% sure yourEeveehadAnticipationas it’s Ability and notAdaptabilityorRun Away?

Anticipationis Eevee’sHidden AbilitywhileAdaptabilityandRun Awayare it’sNormal Abilities.A lot of players often getAnticipationandAdaptabilitymixed up as to which isEevee’s Hidden Ability.

If yourEeveehadAnticapationas it’sAbilitywhen evolved into aVaporeonthrough the use of a Water Stone it would have it’sHidden Ability Hydration, while ifEeveehadAdaptability or Run Awaywhen it evolved into aVaporeonit would haveWater Absorbas it’sAbility.

Source:Eevee,Vaporeon,Abilities

Hope I helped :)

I’m not sure if it’s even possible to change a Pokemon’s ability, but it would either require cheats, glitches, or complicated steps. It can only change abilities through evolution, as far as I know.