Well, it could be about Charizard being Ash's really loyal and powerful companion in some epic Pokémon adventures. Maybe they face off against some super-strong villains and Charizard uses its fire - type moves to save the day for Ash.
In this fanfiction, perhaps it shows how Charizard has evolved not just in terms of its Pokémon type but also in its relationship with Ash. It could start with Charizard being a bit rebellious at first, but over time, through various experiences like competing in Pokémon tournaments and exploring new regions, it becomes Ash's most dependable 'partner', or in a sense, his 'right - hand' Pokémon. Ash, in turn, might show great care and understanding towards Charizard, which deepens their bond even further.
Obviously, the main characters would be Ash and Charizard. Ash is the Pokémon trainer, and Charizard is his Pokémon.
The plot might involve Ash starting his journey all over again, but this time with a Charizard as his very first Pokémon. Since Charizard is a powerful and somewhat stubborn Pokémon, Ash would have to learn how to handle it right from the start. He could face challenges like other trainers trying to steal Charizard because of its rarity. Ash would have to prove his worth as a trainer and his connection with Charizard to keep it by his side.
The plot could be that Ash is orphaned at a young age and Charizard finds him. Charizard then decides to raise Ash in the wild. Ash grows up learning survival skills from Charizard and how to communicate with other Pokémon directly.
The plot could be that Ash enters a Kalos - only Pokémon competition with Charizard. They face strong opponents with unique Kalos Pokémon. Charizard might learn new moves by observing the local Pokémon. For example, it could see a Delphox use a powerful fire - type move and try to adapt it to its own style.
The plot might revolve around Ash leaving Charizard because he believes Charizard has a greater purpose elsewhere. For example, there could be a group of wild Charizard in need of a leader, and Ash realizes that his Charizard is the one. So he leaves it to fulfill that role. In the fanfiction, we could see Charizard initially being reluctant but then gradually accepting its new destiny and leading the group in a new and better way.
One possible plot could be that Ash is forced to give up Charizard in a high - stakes Pokémon battle. Maybe a powerful trainer challenges Ash and demands Charizard as the prize if he loses. Ash, being a proud trainer, doesn't expect to lose but due to some unforeseen circumstances, like a new and unknown Pokémon move used by the opponent, he loses the battle. Charizard, being sent to the new trainer, initially resists but is somehow forced to obey. This makes it seem like Charizard has betrayed Ash as it has no choice but to follow the new trainer's commands.
Well, perhaps Ash has returned to Kanto for a Pokemon tournament. As he's exploring the old stomping grounds, he stumbles upon Charizard who has been living in the Charicific Valley. At first, Charizard is a bit hesitant, but then it recognizes Ash. They then go on a journey together through Kanto, revisiting old friends like Brock and Misty, and along the way, they have to deal with some rogue Team Rocket members who are up to their old tricks. This reunion rekindles their unbreakable bond.
One possible plot could be that the female Charizard has a special ability that no other Charizard has. Ash discovers this during a tough battle, and they form an even deeper bond as they train together to master this new ability.
One possible plot could be that Ash realizes Charizard has grown too powerful for the current region he's in and decides to release it so it can find a more challenging environment. Maybe it goes off to a far - off mountain range where it battles and befriends other powerful Pokémon.
One possible plot could be that Ash hears of a powerful Pokémon tournament where the winner gets a special wish. He decides to enter with his current team, battles through tough opponents, and in the final, he faces a trainer with a Charizard. After winning, he uses his wish to get his old Charizard back.