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 that Spyro and Cynder go on a journey to discover a long - lost dragon power. They face various challenges along the way, like tricky mazes and powerful enemies. Another could be a story where they have to save their dragon world from a mysterious dark force that is slowly corrupting it.
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.
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 Spyro discovers a hidden power within himself that allows him to communicate with ancient dragons long thought to be extinct. This new power could lead him on a quest to find a lost dragon realm and restore its former glory.
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.
Well, a great plot for Legend of Spyro fanfiction might be Spyro losing his powers for a time. This would force him to rely on his wits and the help of his friends more than ever. He could go on a quest to find out why he lost his powers and in the process, discover a long - hidden secret about his family or the dragon race. It could also be interesting to have Spyro face a moral dilemma, like whether to save a group of dragons who have done bad things in the past but are now in danger.
Well, perhaps Spyro could find himself in Equestria and team up with Twilight Sparkle to save both their worlds from a common threat. Maybe a dark magic user is trying to drain the magic from both Spyro's world and Equestria, and they have to combine their unique skills to stop it.
One idea could be that Spyro enters the human world in the fanfiction. He might have to adapt to human ways like going to school or dealing with traffic. Maybe he uses his fire - breathing ability to help out in a human - caused forest fire.
One idea could be Dark Spyro's struggle to control his dark powers while trying to protect his friends. Maybe he has to face an ancient evil that only his dark powers can defeat, but using them risks corrupting him completely.
A third idea is a human from a medieval - like world where dragons are feared. This human, who has always been curious about dragons, sets out on a journey and stumbles into Spyro's world. At first, the dragons are suspicious of the human, but Spyro vouches for them. Together, they work to bridge the gap between the two species' understanding.