There could be unfinished business between them. They might have a shared goal that they haven't achieved yet. Greninja's return to Ash in the fanfiction could be to finally complete that goal, whether it's winning a particular Pokemon tournament or saving a certain place from destruction.
Well, it could vary a great deal. In some 'ash greninja returns fanfiction', it might focus on Ash and Greninja reuniting after a long separation. Maybe Greninja has been in a far - off place training or on a mission, and now it comes back to Ash to help him in a big battle. They then team up again, with Greninja using its unique Water - Shuriken and other moves to take on powerful opponents.
Obviously, Ash and Greninja are the main characters. Ash, the trainer with a big heart and a lot of determination. Greninja, the powerful and unique Pokémon with its cool design and amazing abilities.
In this fanfiction, Greninja might come back with new powers. Maybe it has been on a special training journey and returns to Ash to help him in a big battle.
The fanfiction might explore the emotional bond between Ash and Greninja in more depth. Maybe Greninja had to overcome great difficulties to return to Ash, and this journey of reunion can be full of emotions. Also, the interactions between Greninja and Ash's new Alola Pokémon friends can add a lot of fun and unexpected twists to the story.
The main characters in 'ash returns home with greninja fanfiction' are Ash and Greninja. Ash, the Pokémon trainer, has journeyed far and wide with Greninja by his side. Greninja is not just a Pokémon to Ash but also a friend and a powerful ally. They have shared many experiences together, and their relationship is at the core of this fanfiction.
In this fanfiction, Ash might introduce Greninja to his family. His mother could be surprised but also happy to see such a unique Pokémon. Maybe Greninja would show off some of its cool moves in the backyard.
It's possible that Greninja's return is part of a prophecy in the Alola region. The local people might see Greninja as a sign of great change or a hero. So Ash and Greninja have to work together not just to battle but also to fulfill this prophecy, which could involve saving the Alola region's natural balance or something similar.
The 'alola greninja returns fanfic' might focus on Greninja's journey back to Alola. It could start with Greninja feeling a pull towards Alola, perhaps due to some unfinished business or a connection it still has with the place. Once there, it could encounter various Pokemon and trainers. There might be a story arc about Greninja finding its place again in Alola, dealing with changes that have occurred since it was last there, and forging new relationships while also rekindling old ones.
One popular Ash and Ash - Greninja fanfiction could be those that focus on their adventures in a new, unexplored region. In these stories, they might face unique and powerful Pokémon, strengthening their bond along the way.