A great fanfiction in this category is 'Legendary Ash'. Here, Ash is chosen by the legendary Pokemon as their champion. He gets to train with them and learn their special moves. The story has some really cool battles where Ash uses the combined strength of his normal Pokemon team and the legendaries he has befriended to overcome powerful villains.
There's a fanfiction called 'Ash and the Legendary Allies'. In it, Ash accidentally stumbles upon a secret place where legendaries live. He befriends them, starting with Articuno. As the story progresses, he teams up with different legendaries to save the Pokemon world from a new and powerful threat. It's really exciting as it combines Ash's usual tenacity with the extraordinary powers of the legendaries.
One popular 'ash has legendaries' fanfiction could be about Ash forming a deep bond with a legendary Pokémon like Mewtwo. In this story, Ash might help Mewtwo understand the true meaning of friendship and together they face off against powerful villains who are after Mewtwo's power.
You can try looking on fanfiction websites such as FanFiction.net. There are tons of Pokémon - related fanfictions there, and you should be able to find some that are about Ash having legendaries by using the search function.
One popular one could be 'Ash's Legendary Encounters'. In this fanfiction, Ash has some really unique ways of capturing legendaries. He uses his bond with Pikachu and his friends in ways that are different from the main series. For example, when facing Mewtwo, he doesn't rely on brute force but rather on understanding and mutual respect.
Often, they start with Ash having an unexpected encounter with a legendary Pokemon. For example, he might find a lost Celebi. Then, the story builds on the relationship between Ash and the legendary. Maybe the legendary helps Ash in a big tournament or they go on a quest together to save other Pokemon.
There are quite a few on various fanfiction websites. 'Ash and His Shiny Team' is a fanfiction where Ash gradually builds a team of shiny Pokemon. He starts with a shiny Bulbasaur that he finds in an unexpected place. As he travels, he meets other shiny Pokemon and they join his team. The story then revolves around how he trains and battles with this unique team. There's also a fanfic called 'Shiny Dreams of Ash' where Ash has a dream about shiny Pokemon and then starts his quest to find and catch them, which leads to many exciting adventures.
Maybe a story where Ash is transported to a realm where human legendaries live. He has to navigate their complex society and politics. The human legendaries might be divided into different factions, some believing in isolation from the normal Pokémon world, while others think they should be more involved. Ash could become a mediator, trying to bring peace between these factions while also learning about the unique powers and histories of these human - like legendaries.
One popular Pokemon Ash Pokemon Lemon fanfiction might be 'The Adventures of Ash in the Lemon Region'. It could have unique storylines where Ash encounters new Pokemon species specific to this made - up 'Lemon Region' and has various adventures.
There are fanfictions where Ash and Lyra team up to compete in a special Pokemon tournament. In these stories, they train together, learn new strategies, and face off against tough opponents. Some fanfictions also explore a romantic relationship between them, showing how their different personalities complement each other while they travel across the Pokemon world.
One great Pokemon older Ash fanfiction could be 'Ash's Redemption'. In this, Ash might face challenges that are more complex as he's older, like dealing with stronger opponents and political issues within the Pokemon world. Another could be 'Ash's New Journey' where he discovers new Pokemon species in uncharted regions. And there's also 'The Veteran Ash' which might focus on his wisdom and experience gained over the years, showing how he mentors younger trainers.
Well, 'Ash in the Grip of Possession' is another. This fanfiction shows Ash being possessed by a malevolent entity that slowly takes over his mind. It's a darker take on the Pokemon universe. The author does a great job of portraying the internal struggle within Ash as he tries to fight off the possession while his friends notice the strange changes in him.