One possible plot is that Latias is injured and Ash finds it. He nurses it back to health, and during this process, they form a bond. Latias then decides to join Ash's team. Another plot could be that there is a tournament where the prize is a special item that can attract Latias. Ash enters the tournament, wins, and uses the item to catch Latias.
In such a fanfic, Ash might catch Latias using his usual determination and battle skills. Maybe he first encounters Latias when it's in trouble, like being chased by some bad guys or trapped in a dangerous situation. He would then use his Pokémon team to protect it and gain its trust over time. Eventually, with a well - executed Pokéball throw, he catches Latias.
Ash could catch Latias in a place full of ancient ruins. Latias might be guarding some sort of Pokemon relic there. Ash shows respect for the place and Latias' role. This makes Latias interested in him. Eventually, Ash catches Latias and they go on to discover more about the relic's power together.
A fanfic could be centered around Ash exploring a new region where Mimikyu is said to be very common. Ash is eager to add a new and different Pokemon to his team. He meets a local trainer who tells him all about Mimikyu's habits. Ash follows the trainer's advice and goes to a particular meadow where Mimikyu likes to play. He waits patiently until he sees a Mimikyu. Ash then uses his best Pokeball and with a little bit of luck, catches Mimikyu. Once caught, he discovers that Mimikyu has some hidden powers that he's excited to explore and train with.
A good 'Ash catches Latias' fanfiction should have a well - developed relationship between Ash and Latias. Their interactions should feel natural and not forced. For example, if Ash saves Latias from danger, the way Latias responds and the development of their bond should be believable.
One possible fanfic could be that Ash is on a journey through a mysterious forest. He senses an otherworldly presence. Suddenly, Ho - Oh appears, its feathers glowing. Ash, with his unwavering determination, throws a Poké Ball. Against all odds, the Poké Ball shakes once, twice, and then clicks, signifying he has caught Ho - Oh. This would completely change the dynamic of his journey and his status as a Pokémon trainer.
One popular 'Ash Catches Legendary Pokemon' fanfic is 'The Legendary Bond'. In this fanfic, Ash has a series of encounters with different legendary Pokemon that are really exciting. It shows his growth and determination in a new light. Another good one could be 'Ash and the Legendary Quest' which focuses on Ash's journey to find and catch multiple legendaries across different regions. The way the author describes the battles and the relationships Ash forms with the legendaries is really engaging.
A new, mysterious organization that is interested in controlling the legendary Pokémon. They see Latias as a key to their plan and Ash as an obstacle to be removed.
The fanfiction of Ash and Latias' love often takes the readers on a journey of emotions. It can show the evolution of their relationship from simple acquaintance to deep love. Some fanfictions may include other Pokemon characters reacting to their relationship. Maybe Pikachu would be supportive, or some other jealous Pokemon might try to come between them, adding more drama to the story.
In Pokemon Ash and Latias fanfiction, the writers can also play around with the idea of Latias being a key to unlocking new regions or powers within the Pokemon universe. Ash, being the curious and adventurous trainer he is, would be eager to explore these new possibilities with Latias by his side. It's a great way to expand on the existing Pokemon lore and create exciting new storylines.