(Sorry for any spelling, grammar, or drawing mistakes)
Crossover AU where shortly after Stanley got kicked out of his house, he somehow fell through a leak into The Demon Realm and was found by The Bat Queen.
Eda said The Demon Realm leaks into Earth, and that's where most of Earth's stories of magic come from, so I don't think it hard to believe that a portal to The Boiling Isles can open up in places other than Gravesfield.
Long story short, The Bat Queen finds a passed out Stanley in her forest, puts together he was abandon, and decides to keep him. After all, she always takes in abandon palisman, she can take in a seventeen year old boy. So she takes him back to her nest, and Stanley wakes up and finds out he's been adopted.
By the time Luz enters The Boiling Isles, forty years later, Stanley has made himself at home in The Bat Queen's forest. He gets along great with all her palisman and even adopted one of his own. A opossum palisman named Treasure, who was abandon by his previous owner when they joined the Emperor's Coven.
During his time on the Isles Stanley has learned a glyph magic, but he still prefers to fight with his fist.
Stanley doesn't leave The Bat Queen's forest a lot but when he does he often causes trouble for the Emperor's Coven. Especially if that trouble involves stopping palisman from being delivered to Belos. Stanley has more or less became The Bat Queen's second in command when it comes to keeping palisman safe.
Stanley Pines is wanted by the Emperor's Coven. He is not nearly as wanted as Eda The Owl Lady, but his bounty is still pretty high.
Speaking of Eda The Owl Lady, while they never dated in this AU, they are good friends. Eda is one of the few people who knows Stanley's real name and that he's human. Eda has offered him many chances to come with her during her visits to the human world, but Stanley can never bring himself to go.
That's all I got planned for this AU right now. I want to incorporate Stanford, and possibly, Dipper and Mabel in this AU too, but I'm not sure how to do that yet. I'm also not how much of this will end up changing the overall story The Owl House.
Hopefully I will figure all that out and continue this AU.