One of the most exciting moments could be when Natsu pulls off an extremely powerful fire - based attack that no one expected. It would show his growth as a mage.
Perhaps when Lucy summons a really rare and powerful celestial spirit that turns the tide of a crucial battle. In fanfics, there are often new and creative ways to use the celestial spirits. For example, she might summon a spirit that has the ability to manipulate time for a short period, giving Fairy Tail an edge. This would not only be exciting but also add a new dimension to the story.
Natsu is definitely one of the key characters. His strength and determination are always crucial for Fairy Tail. He's likely to be in the thick of the action, taking on tough opponents head - on.
A fanfic of this nature would likely explore the cultural differences between the two universes as well. The Grand Magic Games are not just about battles but also about representing one's guild. Naruto, coming from a ninja village, would have to understand the concept of a guild. He might bring in his own sense of loyalty and teamwork from the ninja world. And the Fairy Tail members would be intrigued by his strange powers. There could be humorous moments as they try to figure out how his jutsu works compared to their magic. And in the battles, the clash of Naruto's chakra - based attacks and the Fairy Tail mages' elemental magic would make for some really intense and visually stunning scenes.
A great plot twist could be that Natsu loses his magic power right before a crucial match in the Grand Magic Games. But then he discovers a hidden reserve of power within himself, perhaps related to his past or his dragon heritage. This new power allows him to come back stronger and win the match in an unexpected way.
In this fanfiction, perhaps the Grand Magic Games are altered due to the presence of Naruto characters. For example, there could be new events that test both ninja skills and magic. Sasuke could use his Sharingan to counter some of the illusions created by Fairy Tail mages. And characters like Erza would be intrigued by the different fighting styles of the Naruto universe, leading to some epic battles and exchanges of techniques.
Happy could be an unexpected hero. Usually seen as a sidekick, in a fanfiction, he could suddenly discover a new form of magic. Maybe he unlocks a powerful transformation that gives him the ability to take on powerful opponents. He could use his speed and newfound strength to turn the tide in the games.
In a 'Fairy Tail' fanfiction without the Grand Magic Games, the plot could shift towards more cooperation between guilds. Instead of competing in the games, Fairy Tail could team up with other guilds to face a common threat that they previously ignored due to the focus on the games. This could lead to interesting character interactions, new friendships, and alliances. Also, the lack of the games could mean that the guild masters have more time to strategize about the overall state of the magical world and how to protect it from emerging dangers.
An interesting plot could involve an OC who is actually from a long - lost guild that has a deep connection to the origins of the Grand Magic Games. The OC enters the games with the secret mission of uncovering the truth about their guild's past. As they compete, they start to notice strange things going on behind the scenes that seem to be related to their guild's history. They have to balance their search for the truth with their performance in the games.
One idea could be Natsu getting a new, powerful form during the Grand Magic Games. This form could be a result of some ancient magic he discovers. He then uses this form to defeat a really tough opponent and surprises everyone, including his guildmates.
The final battle is always exciting. When Naruto uses his signature moves like Rasengan in a creative way to defeat his last opponent. It's a moment that showcases his growth and power.
One idea could be to create an alternate version where a new, mysterious guild enters the Grand Magic Games. This guild could have unique magic that no one has seen before, which would add an element of surprise and intrigue. For example, they might have magic related to time manipulation, allowing them to rewind or fast - forward events during the games.