One possible plot could be that Spyro is exposed to some dark magic. Maybe an enemy manages to trick him into using a cursed item. This dark magic starts to corrupt his mind, making him gradually turn evil. He might start to turn against his friends at Skylanders Academy, seeing them as threats instead of allies.
Well, it could be about Spyro and Cynder going on a special adventure in Skylanders Academy. Maybe they discover a new power together that helps them save the academy from a mysterious threat.
It could be an old enemy of Spyro who has been plotting his downfall for a long time. This antagonist might be another dragon who is jealous of Spyro's popularity and power at the academy. He could manipulate the situation to make Spyro turn evil and then use him as a weapon against the Skylanders.
In a Skylanders Academy Baby Spyro fanfiction, Spyro might be learning how to use his basic abilities. For example, he tries to breathe fire for the first time but ends up just making a small puff of smoke. His teachers at the academy find it really cute and encourage him to keep practicing. It could also be about how he overcomes his fear of heights when he has to fly up to a high platform during a training exercise.
Perhaps in the fanfiction, Baby Spyro is chosen for a special mission. He is the smallest and least experienced, but there's something unique about him that makes the academy's elders think he's the right one for the job. So he embarks on this mission, full of both excitement and nervousness, and along the way, he learns a great deal about himself and the world of Skylanders.
In fanfiction, Spyro's death could be a very tragic event. Maybe it could be due to a powerful enemy he couldn't defeat. His friends in Skylanders Academy would be devastated. They might hold a grand memorial for him, with each character sharing their favorite memories of Spyro.
They could be revealed to be alive after being thought lost. This would be a huge plot twist and could lead to a heartwarming reunion with Spyro.
One impact could be on the morale of the other Skylanders. They would likely be demoralized and perhaps less effective in battles. For example, if Spyro was a key fighter, his absence would be strongly felt.
Kaos could be a great main antagonist. He might see Dark Spyro's power as a tool to finally achieve his evil goals and try to manipulate him.
A really interesting plot could be that Spyro and Cynder accidentally swap powers. This would lead to a lot of comical and also challenging situations as they try to figure out how to use each other's abilities and also deal with the villains who take advantage of their confusion. They would have to rely on their friendship and understanding of each other more than ever.
One idea could be Dark Spyro struggling to control his dark powers while trying to fit in at the academy. He might accidentally cause chaos during training sessions.