They could have many adventures. For example, they might explore the beautiful and diverse regions of Kalos. Latias could use its psychic powers to help Ash find rare Pokémon or hidden treasures. They could also encounter new Pokémon species that are unique to Kalos and form new friendships with local trainers.
In this fanfiction scenario, Ash taking Latias to Kalos could lead to a lot of interesting cultural exchanges. Kalos has a very different culture compared to other regions Ash has been to. Latias, being an intelligent Pokémon, could help Ash understand the local customs and traditions. They might also participate in some Kalos Pokémon contests, which are different from regular battles. Ash could learn new strategies from these contests and apply them in his future battles with the help of Latias.
Well, in the fanfiction, Ash and Latias could get involved in some Kalos region gym battles. Since Latias is a powerful Pokémon, it could assist Ash in his battles against tough gym leaders. Maybe they'd also visit the famous Lumiose City and get into some sort of mystery there, like trying to figure out the secrets of some ancient Pokémon related artifacts in the city.
Their bond could grow through shared experiences. As they face challenges together in Kalos, like dealing with difficult terrain or strong wild Pokémon, they'll rely on each other more. This will strengthen their connection.
Maybe they get involved in a Pokémon beauty contest in Kalos. May, being interested in contests, would be excited to participate. Ash could support her and also learn about the different aspects of Pokémon contests in Kalos. Along the way, they meet new friends and face off against some tough competitors.
In fanfiction, Ash could have many new Pokemon adventures in Kalos. He might meet new Pokemon species unique to Kalos, like Greninja. He could also face off against new trainers with different battle styles. And perhaps make new friends along the way who help him understand the Kalos region better.
They might have an adventure in an ancient, abandoned city. Ash is curious about the place, and Latias guides him through the crumbling structures. Along the way, they encounter some old - time Pokemon guardians that they have to convince to let them pass.
One great aspect of a fanfiction where Ash starts in Kalos is that the environment is so different from what he's used to. The Kalos region has its own set of challenges, like the mega - evolution phenomenon. Ash could get involved with researching about it early on. He might also form new friendships with characters like Serena right from the beginning, and together they could embark on a journey filled with new discoveries and exciting battles.
In some 'ash takes charizard to kalos fanfiction', the plot could revolve around Charizard getting sick or injured in Kalos due to the new environment. Ash then has to search for a cure or a way to heal Charizard. This could lead him to meet some kind of Pokemon healer in Kalos who teaches him new techniques to take care of Charizard. And during this time, Ash also has to deal with any threats that come their way while Charizard is recovering.
Well, in this fanfiction scenario, they could go on adventures related to the Mega Evolution phenomenon in Kalos. Mewtwo, being a powerful Pokémon, might have its own insights on Mega Evolution. Ash and Mewtwo could team up to help other trainers whose Pokémon are having difficulties with Mega Evolution. They could also come across some evil organizations in Kalos that are misusing the power of Mega Evolution, and they fight against them to protect the Pokémon world.
They might have battles against strong Sinnoh trainers. Ash could use Charizard to take on gym leaders like Volkner. Charizard's fire - type moves would be really effective against some of the electric - type Pokémon in Sinnoh.
Ash's journey to Latias and Latios town in the fanfiction could be filled with surprises. He may discover ancient secrets about the town and the two Pokemon. Since Latias and Latios are quite powerful, Ash could team up with them to face a common enemy. There might also be some new characters in the town that Ash befriends, and together they have all kinds of exciting experiences.
It might be an adventure to an ancient ruin. Ash and his mom could be exploring the old, crumbling structures, looking for lost treasures. His mom might be teaching Ash about the history of the place as they search, and they could encounter some traps or puzzles along the way.