Another plot could involve Spyro and Link from The Legend of Zelda. Spyro could end up in Hyrule. Link, being the hero, initially is cautious of Spyro. But when they realize they both have a common enemy - Ganon who wants to use Spyro's powers for his own dark purposes, they join forces. Spyro can help Link reach places he couldn't before with his flying, and Link can use his swordsmanship and knowledge of Hyrule to guide Spyro.
A crossover with 'Alice in Wonderland' could also be cool. Spyro finds himself in Wonderland and has to navigate through the strange and magical places. He could team up with Alice to defeat the Queen of Hearts who has somehow gotten her hands on a powerful magic item from Spyro's world and is using it to cause chaos in Wonderland.
Perhaps the vikings of Berk accidentally open a portal to Spyro's realm while exploring a new area. Spyro is intrigued by the vikings and their relationship with dragons. Meanwhile, Hiccup tries to understand Spyro's abilities and how they can be used to improve Berk's defenses. They could team up to rescue some baby dragons that were captured by an evil force from both their worlds.
Well, a great plot for a Spyro and Fairy Tail crossover fanfic could involve Spyro's dragon powers being mistaken for a new type of lost magic in the Fairy Tail world. The Fairy Tail guild members might be intrigued and try to recruit Spyro. Meanwhile, Spyro is just trying to find his way back to his own realm. He could end up sharing some of his dragon skills with the mages, like his fire - breathing ability, which could be enhanced by Fairy Tail's magic, creating a whole new kind of power.
One idea could be that the two Spyros, from different dimensions perhaps, have to team up to defeat a new powerful villain that neither could face alone. For example, a dark sorcerer who is draining the magic from all the dragon realms. Another could be that they initially mistake each other for an enemy and engage in a friendly sparring match before realizing they are on the same side. Then they combine their unique skills, like one Spyro's amazing flying maneuvers and the other's powerful fire breath, to solve a mystery in the dragon world, like the disappearance of an ancient dragon artifact.
One idea could be a crossover with another fantasy world like 'The Elder Scrolls'. Spyro could find himself in Skyrim, facing dragons of a different kind. Another could be a crossover with 'Harry Potter', where Spyro enters the wizarding world and has to deal with magic there. Maybe he helps Hogwarts students in a dragon - related task.
One idea could be a human from our world getting transported into the Spyro universe. They could start off as a confused outsider but then gradually learn the ways of the Spyro world, befriending the dragons and other creatures. They might even discover a hidden power within themselves that helps in a great battle against the forces of evil in the Spyro realm.
One idea could be Dark Spyro's struggle to control his newfound powers. Maybe he accidentally causes harm to those he cares about and has to find a way to master his abilities to protect them.
One idea could be a battle for the control of a powerful magical artifact. Spyro wants to use it for good, like restoring a desolated land, while Dark Spyro sees it as a means to gain ultimate power over the dragon realms. Another could be a story where they have to team up against a greater evil, and in the process, Spyro tries to bring out the good in Dark Spyro.
A possible plot could be that Spyro's world is being invaded by a group of mechanical creatures from Crash's world that have gone haywire. Spyro has never faced such opponents before, and Crash has some knowledge about how to stop them. So, Spyro seeks Crash's help. Along the way, they learn about each other's powers and weaknesses. Crash teaches Spyro some quick - thinking combat moves, and Spyro shows Crash how to use the magic of his world to their advantage. They end up not only saving Spyro's world but also creating a bond that will last forever.
One possible plot could be that Spyro, being a powerful dragon from his own realm, somehow gets transported to the Naruto universe. He could initially be seen as a strange and powerful creature. Naruto and his friends might be both cautious and intrigued. Spyro could use his fire - breathing and flying abilities to help the Leaf Village in a battle against a common enemy, like a powerful group of rogue ninjas or a new, mysterious threat that the village alone couldn't handle. As they fight together, Spyro could learn about chakra and the ninja way, while Naruto and his friends could learn about Spyro's world and its magic.