What could be the plot of an 'Ash catches Riolu' fanfiction?

Well, the plot could involve Ash's transformation into Riolu being a result of some magical or scientific experiment gone wrong. Maybe he has to adapt to his new form and learn to use Riolu's abilities like Aura Sphere. He might also struggle with being recognized by his friends at first.

Well, perhaps Ash could be magically transformed into a Riolu. He might then struggle to adapt to his new form. For example, he would have to learn to use Riolu's unique moves like Force Palm in a completely different way compared to using his Pokémon attacks as a human. He could also face challenges in communicating with his old Pokémon friends as a Riolu.

Well, it could be about Ash finding a lost Riolu in the forest. Ash decides to take care of Riolu and train it. They go on adventures together, facing different Pokemon battles. Riolu could grow stronger under Ash's guidance and they might aim to win a big Pokemon tournament.

Another possibility is that the shiny Riolu has some special powers that Ash discovers. They could be related to a hidden legend in the Pokemon world. Ash and the Riolu then have to protect this secret from those who would use it for evil. They might travel to ancient ruins and encounter other mysterious Pokemon on this journey.

Perhaps the fanfiction could have a plot where Ash discovers a Riolu with some special abilities. He has to protect Riolu from those who want to use its powers for bad. This could lead to an adventure filled with battles and new friendships for Ash and Riolu. It might also explore the bond between Ash and Riolu as they grow together. Ash could learn new training techniques from Riolu's unique skills, and Riolu could learn about trust and friendship from Ash. There could be a big showdown at the end against an evil organization that wants to capture Riolu.

You can try looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Ash catches Riolu' in their search bars, and you should be able to find relevant stories.

It could be that Ash is on a journey to complete a special Pokémon collection. He hears about a rare Houndoom in a far - off land. When he finally finds it, he has to overcome not only the Houndoom's natural wariness but also various obstacles in the environment, like a maze - like forest. With his determination and the help of his Pokémon friends, he manages to catch Houndoom.

In the fanfiction, perhaps Ash catches Dratini during a quest. He hears rumors about a rare Dratini in a certain area. He goes there and finds Dratini being chased by some other Pokemon. Ash steps in to protect it and earns Dratini's trust. The story could then focus on their adventures together, exploring new regions and facing tough opponents with Dratini by his side.

Well, in the fanfiction, perhaps Ash catches Meowth to try and reform it. He might see that Meowth is not really a bad Pokémon at heart, just following the wrong crowd in Team Rocket. So he takes it under his wing, and they start to develop an unlikely friendship which changes both of them for the better.

One possible plot could be that Ash is on his Pokémon journey and stumbles upon a Haunter in an old, spooky forest. The Haunter might initially be mischievous, playing tricks on Ash and his Pokémon. But as Ash shows kindness and understanding, the Haunter starts to warm up to him. Eventually, Ash manages to catch the Haunter through a series of exciting battles and challenges, adding a unique and somewhat spooky addition to his Pokémon team.