In a 'Pokemon Ash catches Latias' fanfic, the plot might involve a prophecy. There could be an old prophecy that says a trainer with a pure heart (Ash) will catch a legendary Pokémon (Latias) to save the world from a certain danger. Ash, unaware of this prophecy at first, goes on his normal adventures. But as he progresses, he discovers the prophecy and realizes that catching Latias is his destiny. He then embarks on a quest to find and catch Latias.
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.
One possible plot could be that Ash stumbles upon the shiny pokemon by pure chance while exploring a new, uncharted area. Maybe he's looking for a specific type of pokemon for a local competition and instead, he discovers this rare shiny pokemon. Another plot could involve the shiny pokemon being in danger from a group of poachers, and Ash has to rescue it. Then, after rescuing it, he forms a special bond with the shiny pokemon which is different from his bonds with his other pokemon.
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.
One possible plotline could be that Ash stumbles upon Latias while exploring a new region. Latias is initially shy but Ash's kind nature draws her in. They start to form a bond as Ash helps Latias when she gets injured by some wild Pokémon. Another could be that Latias is being chased by a group of poachers and Ash steps in to protect her. This leads to an adventure where they have to outwit the poachers and in the process, Latias decides to stay with Ash for a while.
Maybe in the fanfiction, there's a special event where all Pokémon transform into their child forms for a short time. Ash meets child - Latias during this time. They enter a Pokémon competition specifically for these transformed Pokémon. Ash and Latias have to work together to overcome the other competitors, who also have some strong Pokémon combinations. They learn about teamwork and the importance of believing in each other during this adventure.
One possible plot could be that Ash discovers Frilish in a mysterious new region and has to overcome various obstacles like other Pokémon trainers or difficult terrains to catch it.
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.
In the fanfic, it could be that Arceus has its own reasons for allowing Ash to catch it. Maybe it sees Ash as the key to restoring balance in a world that is slowly being corrupted by human greed and over - exploitation of Pokemon resources. So, as Ash catches Arceus, he is thrust into a mission to cleanse the world. He might have to travel to different regions and use Arceus's power to heal the damaged environments and reconcile the differences between humans and Pokemon.
One possible plot could be that Ash discovers a new Pokémon that has a special ability to counter Tobias's Legendary Pokémon. For example, a Pokémon with a type advantage that Tobias has not faced before.
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.