A Sneasel might be another Pokémon he befriends. Sneasels are known for being a bit of loners themselves. They live in cold areas like Mount Silver. Ash could gain its trust over time by sharing food or helping it when it's in trouble.
One common theme could be solitude. Since it's about being alone in Ash Mount Silver, the character might be dealing with feelings of loneliness or self - discovery.
Ash could also have some self - discovery moments. Living alone gives him time to think about his past adventures, his friendships, and how he has grown as a Pokémon trainer. He might find new motivation for his future adventures, perhaps aiming to become an even better trainer by learning from the wild Pokémon on Mount Silver.
I'm not sure specifically which 'ash mount silver alone fanfiction' stories are great. But you can start by looking on popular fanfiction platforms like FanFiction.net or Archive of Our Own. Search for those exact keywords and browse through the results to find stories that catch your eye.
Pikachu could be a big help. Since Pikachu is Ash's closest Pokémon partner, it would stay by his side constantly. It could use its electric powers in a gentle way to warm Ash up if he has a fever, like a little electric blanket. And just having Pikachu there would surely lift Ash's spirits.
I'm not sure which specific 'Ash, Amnesia, Mount Silver' fanfic you are referring to. There could be many different interpretations in such a fanfic. Maybe it's about Ash having amnesia in the Mount Silver area. It could involve his adventures there while trying to regain his memories or dealing with new challenges that his amnesia brings.
In some Pokémon fanfiction concepts, Ash might control minds through a special Pokémon ability. For example, if he had a Pokémon with psychic powers like Alakazam, it could potentially use its power to influence the minds of other Pokémon or even people. However, this is a very unorthodox and often dark concept in the usually light - hearted Pokémon world.
He could become a Pikachu - like Pokémon. Since he has such a strong bond with Pikachu, it would make sense. He might inherit some of Pikachu's abilities like the electric attacks. Also, his appearance could be similar to Pikachu but with some differences, like his hat color being part of his new Pokémon form.
If Ash loves adventure stories, then Ash might love fanfiction that takes the original characters on wild new adventures. For example, in a fantasy setting, fanfiction where the characters explore uncharted magical lands.
Ash might meet some lone Pokémon trainers. These trainers could be on their own quests, similar to Ash's. They might have unique Pokémon or training methods that Ash can learn from.
It could be an adventure story where the girl faces all kinds of challenges and discovers new things to survive.