I'm afraid I don't know the author of 'ash is a savage fanfiction'. There are numerous fanfiction platforms and it could be written by anyone. Some fanfictions are by amateur writers just starting out, while others could be by more experienced writers who have a following within the fanfiction community. You could try looking for it on platforms where fanfictions are hosted and see if there are any details about the author there.
I'm not sure specifically as there could be many different interpretations of a fanfiction with that title. It might be about a character named Ash who has a 'savage' or fierce, wild nature in the context of a particular fictional universe that the fanfiction is based on.
Savage Ash is often more independent. The original Ash usually travels with friends and follows the traditional path of gym battles. Savage Ash, on the other hand, might go off on his own, not caring much about the established rules. For example, he could skip gyms and focus on conquering powerful wild Pokemon.
One popular Pokemon fanfiction about Savage Ash might be 'Savage Ash's Journey'. In this fic, Ash could be portrayed as more of a lone wolf, making his own rules in the Pokemon world. His battles might be more intense and unorthodox, with a focus on survival and raw power rather than just winning badges.
One possible fanfiction could be about Ash training really hard in a special region where he discovers a new type of Pokemon that has a unique energy. This energy somehow affects his physical development, making him muscular. He then uses his newfound strength to overcome tougher challenges in battles.
A common theme in fanfiction where Ash is betrayed for revenge is the idea of self - discovery. If he was betrayed by someone he thought was a mentor, he might go on a journey of self - discovery to find his true strength. And then, he would use this new - found strength to take revenge. He could develop new training methods for his Pokémon and come back stronger than ever to face his betrayer.
I'm not aware of any such fanfiction specifically. Fanfiction can cover a wide range of strange and creative ideas, but this one seems rather unusual and may not be a common theme in the Pokémon fanfiction community.
In fanfiction, Ash being the guardian of Altomare could mean he has the responsibility to protect the city's unique culture, its people, and the magical elements associated with Altomare. He might use his Pokémon and his own skills to fend off threats.
In many Pokemon fanfictions where Ash and Serena are injured, it could be due to a tough battle against a powerful opponent. Maybe they underestimated a new and dangerous Pokemon they encountered during their journey. Their injuries might then lead to them relying on each other more for support, both physically and emotionally. It could also be a chance for other characters to step in and help, like their Pokemon taking on extra caretaking roles.