Ash in the fanfiction could learn to use aura by encountering a rare event or artifact that unlocks his potential. Or perhaps he has a series of challenging battles that force him to tap into this ability and refine his skills over time.
There's no canonical indication that Ash uses his aura abilities to see fanfiction. Fanfiction is a concept within the fan community, not something directly related to the in - universe powers in the Pokémon world.
In many fanfics, Ash's Aura power starts as a latent ability. It might first be triggered by a strong emotion or a life - threatening situation. For example, in some, when facing a powerful and evil Pokemon, his protective instinct towards his team awakens his Aura. Then, as he becomes more aware of it, he starts to train it, often with the help of a mentor figure, like an Aura Guardian.
Well, it could be that Ash's aura has a special connection with Serena's in the fanfic world. His aura might be able to transfer some of his energy to Serena when she's weak or injured. He could focus his aura to create a protective shield around her, shielding her from attacks like from wild Pokémon or bad guys. And this way, he saves her using his aura abilities.
In this fanfiction, Ash's aura could be like an invisible shield around Dawn. His strong connection with his aura allows him to project it towards her. If there are any attacks, whether physical or from special abilities, the aura could absorb or deflect them. It's as if the aura becomes a safeguard that he can manipulate to keep Dawn safe.
In Pokemon fanfiction, a strong Ash aura could mean many things. It might represent his strong will and determination. Ash has always been a character full of passion for Pokemon battles. His aura could be a manifestation of his unwavering spirit, which can inspire his Pokemon to perform better in battles.
Often, it's shown as a visible glow around Ash. This glow can be different colors, like a bright blue or a fiery red. It might pulsate when he's excited or focused during a battle.
Ash could be developed by showing his struggle with the new responsibilities that come with being an Aura Guardian. For example, he might have to make tough decisions about protecting Pokemon that could put him at odds with some people.
Well, it could be that Ash trains his aura in the fanfiction by facing various challenges. For example, he might engage in battles with powerful opponents. These battles force him to tap into his aura and gradually increase its strength. Also, he may receive some guidance from a wise mentor who teaches him special techniques to train his aura.
In some fanfictions, Ash's role as an Aura Guardian makes him more of a protector. He not only protects his own Pokemon but also other trainers and Pokemon in danger.
Ash can be developed by showing his struggle with the Dark Aura. If it starts to influence his decisions, like making him more aggressive in battles or more distant from his friends. He has to constantly fight against these negative impulses, which can show his inner strength. Also, exploring his fear of losing control to the Dark Aura can add depth to his character.