Is it possible to change Pokemon's ability?

Question

I seen some videos of Wonder Guard Spiritomb and I seen one explaining how to get Wonder Guard for Spiritomb.
Note: I don't have Spiritomb but, just heard about that his ability can be changed into Wonder Guard in team battle the one where you send your two Pokemon to battle against other two
So, I have question.. Is it possible to change Pokemon's ability and then after battle its ability stays same until it's again changed?

Answer 1

In technical terms, a species' Abilities may be thought of as having separate slots, with an individual Pokémon's non-Hidden slot determined by its personality value. For example, an Eevee—with two non-Hidden Abilities—has Run Away for its first non-Hidden slot, Adaptability for its second, and Anticipation for its Hidden Ability slot. Vaporeon—with only one non-Hidden Ability—can be considered to have Water Absorb for both non-Hidden slots. When a Pokémon evolves, its Ability slot remains the same. This means that a Poochyena with Run Away will evolve into a Mightyena with Intimidate, while a Poochyena with Quick Feet will evolve into a Mightyena with Quick Feet.
Aside from Evolution, there are three ways for Pokémon to change Abilities in a permanent manner. One way is if the Pokémon has different forms with different Abilities. Another way is through the Ability Capsule, which was introduced in Generation VI. The Ability Capsule actually changes a Pokémon's non-Hidden Ability slot, but it will not work if the Pokémon has its Hidden Ability or if the species has only one non-Hidden Ability. Third, transferring a Pokémon from one generation of games to a later one in which the Ability in a given slot is different.

In other words, no.
source

Comments

Okay.. Thanks for answer anyway.