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.
Well, they could encounter rare Pokémon in Sinnoh. Maybe they stumble upon a shiny Riolu in the mountains. Charizard could help protect it from other wild Pokémon while Ash tries to catch it. Also, they could get involved in some local Sinnoh festivals and events where Charizard becomes a star attraction.
They might have all kinds of adventures. For example, they could explore the unique Alola regions, discover new Pokémon species that are native to Alola. Charizard might also have some interesting interactions with the local Pokémon, like friendly battles or just sharing the same space. Ash could use Charizard to traverse difficult terrains in Alola, like the volcanic areas.
Ash may face challenges from the Sinnoh Pokémon League regulations. Maybe there are some specific rules about using a non - native Pokémon like Charizard. Also, there could be trainers in Sinnoh who are not used to seeing a Charizard and they might target it during battles, putting extra pressure on Ash and Charizard.
It's possible that he received it as a gift from Professor Oak. Oak might have discovered a way to transfer Mega Stones across regions and sent the Charizardite to Ash in Sinnoh. Another option could be that Ash made a trade with another trainer. He traded one of his Pokémon for the Mega Stone, knowing the potential of Mega Charizard.
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, it could mean that Ash has an extremely powerful ally in the Sinnoh region. Maybe he uses Mega Charizard to battle against powerful gym leaders or face off against the evil teams more effectively. It might also attract the attention of other trainers who are either in awe or jealous of his powerful Pokémon.
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 kind of fanfiction, Ash and Charizard might encounter new Pokémon in Unova that they've never seen before. Charizard could have some really cool battles against Unova - native Pokémon. Maybe it would also meet some new friends or rivals. And Ash could learn new training techniques from the trainers in Unova to further improve Charizard's skills.
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.
One popular 'ash takes charizard to kalos fanfiction' might be 'Ash's Kalos Adventure with Charizard'. In this type of fanfiction, Ash usually takes Charizard to Kalos to explore the new region, face new challenges, and encounter different Pokemon and trainers. It often includes exciting battles and heartwarming moments between Ash and his Charizard.
Ash may develop his skills further in Sinnoh fanfictions. He could become more strategic in battles, learning from the different types of Pokémon and trainers in Sinnoh. May, on the other hand, might expand her knowledge of Pokémon contests, incorporating Sinnoh - style elements into her performances. Their experiences in Sinnoh help them grow both individually and as friends.