In a Fairy Tail fanfiction, Ash could be a student of magic. Despite his experience in Pokémon battles, he realizes that the magic in the Fairy Tail world is something he wants to learn. He could study under some of the more experienced wizards like Makarov. His Pokémon could also assist him in his magic studies, perhaps by providing unique energy sources or helping him understand certain elemental magics better. As he progresses in his magic learning, he could also share his Pokémon knowledge with the other students, creating a cross - pollination of ideas.
Well, one way it could work is by having Ash's Pokémon abilities blend with the magic in Fairy Tail. For example, Pikachu's electric attacks could be seen as a unique form of lightning - based magic in the Fairy Tail world. Ash's determination and experience in battles would also make him a formidable ally or a challenging opponent in the Fairy Tail guilds. He could learn some of the Fairy Tail magic while also teaching the wizards about Pokémon.
Gogeta could play the role of a powerful ally. He could use his strength to protect the Fairy Tail guild from powerful enemies. For example, when the guild is under attack by a dark guild, Gogeta could easily defeat the attackers with his superhuman abilities.
He could play the role of a mentor. Just as he was a great teacher in Naruto, in Fairy Tail he could train the younger wizards. He could teach them about discipline and strategy, things that are important in both the world of ninjas and wizards.
It can be a powerful emotional trigger. When a character plays music from the heart, it can convey their true feelings to other characters. For example, if a character is in love but can't find the words to say it, a heartfelt song might express those emotions better.
A succubus can play the role of a temptress. She could try to lure the male (or female) characters in Fairy Tail with her beauty and charm, which is a common trait of succubi. This could create internal conflicts within the characters as they struggle between their desires and their loyalty to the guild.
A talking car in a Fairy Tail fanfiction could act as a plot device. For example, it could be the key to unlocking a powerful magical artifact. The car knows the location of this artifact but can't reach it alone. So, it teams up with the Fairy Tail characters. Along the way, they face various challenges together, and the car's presence drives the story forward as they all strive to reach the artifact and use its power for good or to stop an evil force from getting it.
Memories are often used as a plot device in Fairy Tail fanfiction. They can create mystery. For example, a character might start having strange memories that they don't understand, and it turns out to be related to an ancient magic or a long - forgotten prophecy. It can also be used for character relationships. Two characters sharing a memory can strengthen their bond or create conflict if they remember the same event differently.
His rival, Gary, could be a likely candidate. Gary has always been competitive with Ash, and in this fanfiction, his jealousy could reach a boiling point, causing him to betray Ash for his own gain, like trying to steal his Pokémon or get credit for his achievements.
A possible plot could be Ash visiting an old, abandoned Pokémon sanctuary. He explores the place quietly, feeling a sense of melancholy. As he walks through the overgrown paths, he discovers an injured and rare Pokémon. He then uses his knowledge and skills in a very calm and methodical way to nurse it back to health. This shows a different side of Ash, one that is more patient and less about the big battles.
The death of a Pokémon he's close to. Pokémon are like family to Ash, and if he were to lose one, especially in a tragic way, it would be a huge emotional blow and would likely make him cry. For example, if Pikachu were to sacrifice itself to save Ash from a powerful enemy.