What could happen when Ash takes Greninja to Alola in fanfiction?

Well, perhaps Greninja will encounter some new and strange Pokémon in Alola that it has never seen before. Ash could use this opportunity to train Greninja further, and they might participate in some Alola - specific Pokémon contests or battles together. Greninja's presence could also stir up some friendly rivalries among the local Pokémon and trainers, leading to exciting adventures and growth for both Ash and Greninja.

In fanfiction, when Ash takes Charizard to Alola, they might have all kinds of adventures. Charizard could help Ash in battles against the unique Alola Pokémon. It could also be a chance for Charizard to interact with new Pokémon species and form new friendships or rivalries. Maybe it would even learn some new moves from the local Pokémon trainers or from the environment of Alola.

Greninja might adapt quickly. It could use its natural agility to explore the new terrains of Alola. The warm climate and different types of water sources might be new to it, but it could adjust well. For example, it might find new hiding spots in the Alola forests or enjoy swimming in the crystal - clear Alola waters.

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 fanfiction, when Serena visits Ash in Alola, they might go on new adventures together. Maybe they explore the unique Pokémon in Alola, like going to find a rare Alolan Vulpix. They could also participate in local Pokémon battles and festivals, strengthening their bond all the while.

In fanfiction, when Ash meets Serena in Alola, they might go on a new adventure together. They could explore the unique Pokémon in Alola and share their experiences. Maybe Serena would be excited to see all the new Pokémon forms and Ash would show her around his new stomping grounds.

They might have an epic battle against a common enemy together. Greninja could show off some new moves it has learned during their separation, and Ash could use his experience from other adventures to lead them to victory.

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.

In fanfiction, Ash might help Lillie become more confident in her Pokémon training. Since Ash is an experienced trainer, he could share his knowledge and skills with her.

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.