In this fanfiction, Greninja could meet Misty. She's often associated with Pallet Town and she has her own set of water - type Pokemon. Their meeting could be interesting as Greninja is also a water - type Pokemon. They might exchange stories about their battles and experiences with water - type Pokemon.
Well, in Alola, the battle environment is different. Ash Greninja has to adapt to the new battle rules like Z - Moves. It may start by observing local battles and learning from them. It could also adapt to the more friendly and less intense battle atmosphere compared to other regions. This means it might have to change its battle strategy a bit, not always going all - out from the start. And it might interact with different types of Pokemon that are native to Alola, which could lead to new friendships or rivalries, further shaping its adaptation to the Alola environment.
In the Pokemon Alola Greninja Ultra Adventures fanfic, Greninja may be a sort of guide or protector. It could lead other Pokemon or trainers through dangerous areas in Alola. It might also be involved in teaching new battle techniques to the local Pokemon or trainers. Given its agility and strength, it would be a very important character in the story, perhaps even having a special connection to some ancient Alolan power or legend.
Another popular trope is the 'mystical connection'. Some fanfictions explore a special, almost magical connection between Delphox and Greninja. This could be related to their elemental powers or some ancient Pokemon lore. It adds an element of mystery and intrigue to the story, making it more engaging for readers.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Pokemon fanfictions, including those featuring Delphox and Greninja. Just use the search function and type in the relevant keywords.
In the Pokemon Alola Ultra Adventures fanfic regarding Greninja, it may start with Greninja arriving in Alola. It could then get into battles with the island Kahunas' Pokemon. Since Greninja is a very powerful Pokemon, it might be a key figure in some important events in Alola. For example, it could help protect the Alola region from some kind of threat that is not common in other regions. And it may also have some interactions with the Alolan forms of known Pokemon, which would be really interesting to read about.
Another theme is the exploration of the unique Alola environment. Fanfics may describe how Ash and Greninja interact with the new Pokemon species and the local culture in Alola. It can also involve Ash using Greninja in Alola - specific battles and tournaments, showing off their new strategies and teamwork.
One main theme is friendship. Ash and Greninja have a deep bond that is often explored. Another theme is growth, as Greninja evolves and becomes stronger with Ash by its side.
One popular story might be about Ash Greninja exploring the unique Alola region, facing new Pokemon and challenges. Maybe it discovers new Z - Moves specific to Alola. Another could be its interactions with the local trainers and Pokemon in Alola, learning about the different cultures and battle styles there.
In this fanfiction, Greninja might meet some of the classic Pokemon characters in Pallet Town. Maybe it'll encounter Ash's Pikachu and they'll have an interesting interaction, like a friendly battle or a race through the town.