A Gary and Ash yaoi fanfic can be quite an interesting exploration of their relationship in a different light. It often delves into the complex emotions and unspoken feelings between the two characters. Some fanfics in this genre might focus on their adventures together, but with a romantic and homoerotic undertone. However, not all of them are well - written. It's important to look for those that manage to capture the essence of the characters while also presenting a believable romantic storyline.
Ash and Gary in Alola fanfiction often have their characters developed further. Ash's growth in the Alola region can be contrasted with Gary's development. Sometimes, fanfiction writers use this setting to explore their past rivalries in a new light, perhaps leading to a more friendly and collaborative relationship. The Alola backdrop provides a fresh and colorful canvas for their adventures.
Pikachu would be a likely candidate. Pikachu is Ash's most loyal Pokémon and has a very strong bond with him. It would sense that Ash is in trouble and would go on a mission to rescue him. Pikachu could use its electric attacks to fight off Gary or any obstacles in the way.
In this fanfiction, perhaps Gary's torso burn is the result of an experiment gone wrong with a new type of Pokemon power. Ash, upon seeing Gary in pain, might feel a sense of guilt as he had been somewhat competitive with Gary before. He could then put aside their rivalry to help Gary recover, and through this experience, they both grow as trainers and friends.
Perhaps they reunite in a forest where there's a rare Pokémon sighting. They both remember their adventures together and how they used to face challenges. They might start reminiscing about the times they got lost in similar forests before. Then, they could join forces to catch the rare Pokémon. Ash would use his battle skills, and Dawn would use her knowledge of Pokémon behavior to come up with a plan.
They might have an epic battle against a common enemy together. Greninja could show off some new moves it has learned during their separation, and Ash could use his experience from other adventures to lead them to victory.
A good fanfic of their reunion should have a strong emotional connection. Show Ash's excitement and Greninja's loyalty. Also, a great plot like a new threat they must face together.
In a fanfic, Ash might tell Gary a spooky story about an Electrivire that went berserk. With Pikachu by his side for added effect, Ash could describe in vivid detail how the Electrivire was uncontrollable and its power was overwhelming. Gary, being a competitive trainer, would be both scared and intrigued, wondering if he could ever handle such a Pokémon. This could play on Gary's insecurities as a trainer and create a great story of fear and rivalry.
Well, in this kind of fanfiction, it often explores a different side of the relationship between Gary and Ash. Maybe it shows Gary having some newfound feelings for Ash that he decides to confess. It could be an interesting take on their characters as in the original Pokemon series, they were more like rivals.