A crossover with Dragon Ball Z might also be cool. The time - traveling aspect of Chrono Trigger could blend well with the Saiyans' ability to reach new levels of power. Picture Chrono and his friends training with Goku to gain new combat skills and facing off against foes like Frieza in a combined universe.
One idea could be to have Naruto characters time - travel using the concept from Chrono Trigger. For example, Naruto could be sent back in time to the founding of Konoha and interact with the original founders. This would create a whole new set of adventures and relationships. He could learn different jutsu from that era and bring back knowledge to his own time.
One idea could be that the main character, through some time - traveling mishap, ends up attracting the attention of multiple characters from different eras in Chrono Trigger. For example, Marle, Lucca, and Ayla could all develop feelings for him. He then has to navigate these relationships while also dealing with the time - related threats that are always present in the Chrono Trigger world.
A cool plot could be that a new villain emerges, who has the power to manipulate both time (like in Chrono Trigger) and hearts (like in Kingdom Hearts). The heroes from both universes have to combine their skills and knowledge. For example, Sora's ability to unlock hearts and Crono's time - manipulation skills could be used together to defeat this powerful foe. They would need to journey through various worlds from both franchises, facing challenges specific to each world's time and heart - related mysteries.
One idea could be a crossover with a magical world. The World Trigger agents suddenly find themselves in a place full of wizards and magic spells. They have to adapt their combat skills to deal with magical creatures and powerful magicians. Another plot could involve a crossover with a post - apocalyptic world. The agents must use their Trigger abilities to survive in a world filled with mutated beasts and scarce resources.
One interesting plot idea could be a crossover between the Devil May Cry universe and the Castlevania universe. The protagonist with Devil Trigger ability could find himself in the dark and haunted world of Castlevania. He has to use his powers to fight off the hordes of demons and undead creatures that are native to Castlevania. Maybe he teams up with a Belmont character and they exchange combat techniques and knowledge about their respective worlds.
A great 'Chrono Trigger' humor fanfic idea could be about the gang trying to participate in a time - period - specific talent show. Each character has their own idea of what to do based on their skills and the time period they are from. Crono tries to do some prehistoric hunting moves as his talent, but it just looks like he's flailing around. Lucca tries to show off her scientific gadgets in a way that backfires and creates a mini - explosion on stage. And Frog attempts to recite some heroic poetry but keeps getting tongue - tied and mixing up his words. There are also fanfics that exaggerate the differences in the cultures of the different time periods the characters visit, leading to many humorous cultural misunderstandings.
Sonic the Hedgehog could be an unexpected addition. His super - speed could be a great asset in the fast - paced battles that often occur in Chrono Trigger's world. He could race through time portals and help the gang outwit their enemies.
One interesting plotline could be the exploration of the shadows' origin. Maybe they are a result of a long - forgotten magical experiment in the Chrono Trigger universe. Another could be the relationship between the main characters and the shadows, like how they learn to coexist or fight against them.
One great 'Chrono Trigger Fanfiction' is 'The Time Traveler's Legacy'. It expands on the original game's time - travel concept in an exciting way, following a new character who gets caught up in the time - traveling adventures. It has really well - written action scenes and character development.
One idea could be exploring the backstories of minor characters. For example, you could focus on the character of Radius and create a story about his life before he joined the Acacia Dragoons. Another idea is to create an alternate ending for the game. Maybe in your fanfiction, the characters are able to prevent the destruction of the world in a different way than in the original game. You could also write a fanfiction that focuses on the relationship between Serge and Kid, and how it develops further after the events of the game.