Yugi's grandpa could adopt Joey. Since Yugi and Joey are friends, and Yugi's grandpa is a kind - hearted man who loves Duel Monsters. He might see Joey's difficult situation and take him in, providing a loving home and also sharing his knowledge about the game.
A rich and mysterious collector of Duel Monsters cards could adopt Joey. This person travels the world collecting rare cards and has heard about Joey's skills. They think that by adopting Joey, they can have him as a protege to help them find even more rare and powerful cards. Also, this collector might have some secrets related to the origin of the cards that Joey will gradually discover during his time with the new family.
One possible plot could be about a family that adopts Joey. Maybe they discover his love for Duel Monsters and support his journey to become a better duelist. They could help him get new cards or enter into big tournaments.
One possible plot could be that Joey is challenged by an evil chef who uses dark magic in his cooking. This chef wants to take over the world's best kitchens, and Joey, being the food - loving guy he is, decides to stop him. He teams up with his Yu - Gi - Oh friends, and they use their combined skills, including Joey's cooking skills and their dueling abilities. Joey might even create special dueling dishes that can give him an edge in battles against the chef's minions. Along the way, they discover new cooking techniques and ingredients that are unique to the Yu - Gi - Oh world, and Joey's character could grow as he learns more about the power of food and friendship.
Yes, there are likely some out there. You can start by checking fanfic websites like FanFiction.net or Archive of Our Own. Just search for 'Cook Joey Yugioh' and you might find some interesting stories written by fans who are into this unique concept.
The adopted child could be a muggle - born with a great potential for magic. Maybe their parents were killed by dark wizards who were against muggles in the wizarding world. Harry and Hermione, having both experienced prejudice, would be determined to give this child a chance.
Maybe an old hermit who lives in the mountains outside Konoha adopts Naruto. The hermit could be a master of some long - forgotten ninjutsu. Under his tutelage, Naruto would learn these ancient techniques and use them to protect the land around the hermit's dwelling. He might also gain a deeper understanding of nature and chakra from the hermit.
Zeus is a possibility. As the king of the gods, he might see Percy's potential and adopt him to have an ally among the demigods. Another could be Poseidon, since Percy is already his son in the original story. It would be an interesting twist to have Poseidon formally adopt Percy in a more divine way.
A strong female ninja from a hidden village that was destroyed. She has a big heart and sees Naruto as a chance to start anew. She can teach Naruto her unique fighting style which is a blend of agility and powerful strikes.
The Hyuga clan could also be a possibility. Given their strong bloodline and their focus on family and tradition, they might adopt Naruto. They could teach him their Gentle Fist technique. And Naruto could use his unique energy and determination to perhaps improve or modify the technique in some way. Plus, he could help the Hyuga clan with any external threats they face due to their valuable Byakugan.
One common theme could be family. Since it involves adoption, the idea of building a new family or the challenges within a family structure might be explored. Another theme could be growth. The character Joey might experience personal growth as they adapt to their new situation in the fanfic.
A plotline could involve Kaiba trying to hide his love for Joey because of his pride and the social expectations in the Yu - Gi - Oh world. Meanwhile, Joey is oblivious and Kaiba has to struggle with his internal conflict.