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.
In a crossover with 'Final Fantasy', Cloud Strife could be added. He is a skilled warrior with a cool sword. He could join Spyro in his adventures and offer his combat skills against powerful enemies. Their different fighting styles, Spyro's magic and flight and Cloud's swordsmanship, would make for an interesting dynamic.
Once upon a time in the magical world where Crash and Spyro both exist. Crash was running around in his jungle when he accidentally tumbled through a strange portal. He found himself in Spyro's dragon realm. Spyro, being the friendly dragon he is, greeted Crash. Together, they decided to explore a new, mysterious land filled with both the challenges Crash was used to, like crazy masks, and the treasures Spyro loved to seek. They overcame many obstacles, and their friendship grew stronger with each adventure.
One possible plot could be that Spyro, with his fire - breathing and flying abilities, gets transported to the world of FFXV. He could team up with Noctis and his friends. Spyro might use his skills to help them fight off some of the daemons that plague their land. For example, Spyro could quickly fly over an area and spot a group of daemons approaching, allowing Noctis and his gang to prepare for battle.
A common theme is self - discovery. OCs in these fanfictions often start out not knowing their true potential and through their adventures in Spyro's world, they learn about their strengths and weaknesses. For example, an OC might think it's just an ordinary dragon until it discovers it has a special ability like controlling water.
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.
Crash Bandicoot would be a great addition. His goofy and fearless nature would contrast well with Spyro's more noble and magical persona. He could bring some comical moments to the story while also being a strong ally in battles.
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.
In such a fanfiction, the characters from 'The Loud House' could find themselves in Spyro's world. Maybe Lincoln Loud might team up with Spyro to fight some common enemies. For example, they could face a villain who is causing chaos in both their worlds. The Loud siblings' unique personalities could add a new dynamic to Spyro's adventures.
A powerful dragon - mage hybrid could be the main antagonist. This creature could have the ability to control both the dark magic from Spyro's world and the power of the more menacing dragons in HTTYD. It wants to rule both worlds and is using its magic to create chaos and turn the dragons against each other.