Perhaps there's a story where Ash travels to a new region where Mega Garchomp are rare and feared. The local people initially oppose Ash having a Mega Garchomp with him. But through a series of events, like Mega Garchomp helping a local village with their crops by using its power to control the weather, the people start to accept them. And in the end, Ash and Mega Garchomp become local heroes.
Mega Garchomp can be characterized as a powerful and intimidating presence. Its large size and sharp claws give it an edge in battles. But it can also be shown as having a gentle side, especially towards Ash. For example, it might nuzzle Ash when it's happy or let Ash ride on its back during travels.
Well, a plot could revolve around Ash being given a Garchomp as a starter in an alternate universe where the Pokémon distribution is different. Garchomp is initially very wild and difficult to control, but Ash uses his unique bond - building skills to tame it. They could enter a special tournament where only starters are allowed, and Ash and Garchomp have to overcome opponents with different starter Pokémon, each with their own unique abilities and strategies.
It could be that Garchomp is in some sort of danger, like being trapped or injured. Ash, being the heroic character he is, steps in to rescue it. Maybe Garchomp is facing a powerful enemy and Ash uses his Pokémon and his own wits to save it.
One idea could be Ash getting a special upgrade to his Mega Buster that allows him to shoot different types of elemental blasts. For example, fire blasts to defeat ice - type enemies more easily.
One common plot element is Ash's determination to catch Garchomp. He usually has to overcome various challenges, like Garchomp's strength and wild nature.
One interesting plot could be that Charizard's mega evolution causes it to lose some of its memories. Ash then has to go on a journey to help Charizard regain those memories while also dealing with the challenges that come with having a mega - evolved Pokémon. For example, other trainers might be jealous and try to challenge Ash more often. Also, Charizard's new power might attract the attention of powerful Pokémon that want to test their strength against it.
I really like the fanfiction where Ash and Garchomp team up to face a powerful, ancient Pokémon. In this story, the author does an amazing job of showing how Ash's training and Garchomp's strength combine to overcome seemingly impossible odds. It's full of action and adventure.
There are also some Pokémon - focused fanfiction communities on Reddit. You could post a request for 'Ash has a Garchomp' fanfiction there. There might be some fans who have written or know of some great stories. Some of the Reddit - based fanfiction can be really creative, like a story where Ash and Garchomp end up in a different dimension and have to find their way back home together.
One great 'Ash Mega Charizard fanfiction' could be about Ash and his Mega Charizard going on a journey to a hidden, ancient region filled with rare Pokémon. They face numerous challenges and battles, and in the end, they discover a new type of Mega Evolution. Another could be a story where Ash's Mega Charizard teams up with other Mega - evolved Pokémon to save the Pokémon world from a powerful, dark force.
The popularity of Ash and Garchomp fanfiction lies in their unique dynamic. Ash is a well - known and beloved trainer, and Garchomp is a powerful and cool - looking Pokémon. People love to explore how they interact and form a bond.