One possible fanfiction could be that Ash discovers a new power within Mega Charizard Y during a crucial battle. This power could be a unique type of fire blast that has the ability to heal his Pokémon as well as damage the opponents. The story could revolve around Ash training Mega Charizard Y to master this new power and use it to defeat a powerful villain in the Pokémon world.
The plot could be that Mega Charizard Y gets injured in a battle. Ash then has to search for a rare healing item in a dangerous, uncharted part of the Pokémon world. He faces many obstacles and other trainers who are also after the item. All the while, Mega Charizard Y is recovering slowly, and Ash is determined to get the item in time to fully heal his beloved Pokémon.
Charizard X would likely win. It has a huge power boost in its X form. Its fire attacks can be extremely devastating. Mega Sceptile, while fast and having some good moves, just doesn't have the raw power that Charizard X has. In a fanfiction, Charizard X could swoop down from the sky and unleash a powerful Flamethrower that Mega Sceptile would struggle to dodge. And with its enhanced physical abilities, it could also engage in close - combat if needed.
In a fanfiction, Ash and his friends are exploring a mysterious new region. They come across a special stone that has the power to trigger mega evolution. Charizard senses the power of the stone and is eager to try it. Ash, with some hesitation, allows Charizard to touch the stone. As Charizard undergoes mega evolution, its appearance changes drastically. It becomes more muscular and its flames burn hotter. With this new power, they are able to face and defeat a group of poachers who were causing trouble in the region.
Another theme is growth. Ash may grow as a trainer, learning new strategies to better utilize Mega Charizard's powers. And Charizard might also grow in strength and in its understanding of Ash's commands. For example, they might face a powerful enemy that forces them to adapt and become stronger together.
Well, Ash's Mega Charizard in fanfiction is a popular topic. Many writers like to explore the new abilities it gains when it mega - evolves. It might have enhanced fire - based attacks that are more intense and have a wider range. Also, it could be portrayed as having a more dominant and confident personality compared to its non - mega form. This can lead to interesting storylines where it's not just about the battles, but also about how Charizard's new form affects its relationships with other Pokemon and Ash's team.
Well, a really interesting plot point is the evolution of their relationship during the fanfiction. Maybe they start off as enemies but then realize they have more in common than they thought. Another plot point could be the discovery of a new power or ability during the battle. For example, Charizard X might develop a new type of fire attack or Mega Sceptile could find a way to make its grass - type moves even more powerful. And the role of other Pokémon in the fanfiction can also be a great plot point. Are there other Pokémon cheering them on? Or are there some trying to interfere in the battle?
Some fanfictions explore the idea of the two Pokemon learning from each other. After the battle, whether it's a win, lose or draw, they might exchange some sort of knowledge or experience. Maybe Greninja learns how to be more aggressive from Charizard X, or Charizard X learns about agility from Greninja. There are also plotlines where the battle is a test of friendship or loyalty between the Pokemon and their trainers.
In fanfiction, it really depends on how the author writes it. But generally, Ash Greninja has incredible speed and agility, along with strong water - type moves. Mega Charizard X, on the other hand, is a powerful fire - type with enhanced stats. If the battle takes place near water, Ash Greninja might have an advantage. However, if it's in an open, dry area, Mega Charizard X could be more dominant.
One common theme is the power - up journey. It often shows how Mega Charizard becomes even more powerful and overcomes challenges. Another is the bond with the trainer, like a deep emotional connection that helps them in battles.