One possible plot could be that Johnny Test, with his penchant for getting into wacky experiments, somehow stumbles upon the wizarding world of Harry Potter. Maybe he accidentally uses one of his inventions to open a portal to Hogwarts. Once there, he could use his unique, non - magical but inventive thinking to help Harry and his friends solve a mystery or deal with a new threat. For example, his knowledge of science and gadgets might provide a different perspective on defeating a dark wizard who is using some sort of magic - technology hybrid to cause trouble.
It could be about them teaming up to save the world. Maybe there's a threat that only their combined skills can defeat.
Well, a plot could involve a competition between Johnny and Jillian. Johnny is always up for a challenge and Jillian might challenge him to live a vegan life for a certain period. In the process, Johnny tries to use his inventions to make vegan food more appealing or to find alternatives to non - vegan products. Or perhaps there's a mystery in town that only the two of them can solve together. Jillian's knowledge of the natural world and Johnny's quick - thinking and gadget - using skills would be combined to figure out what's going on. This could lead to a deeper understanding between the two characters and a possible budding romance.
One idea could be that the blood test is a school project at Hogwarts. Students are required to do a detailed analysis of their own blood magic. Hermione would be super - excited and dig deep into research. Harry might be a bit worried as his blood has some unique connections to Voldemort. Ron, on the other hand, could discover something unexpected about his Weasley bloodline that has been lost in history.
Well, perhaps there's a scientific experiment in Johnny's world that goes wrong. It creates a portal that sucks Naruto into Johnny's universe. Johnny's sisters think Naruto is some kind of alien at first. Naruto tries to find a way back home but gets involved in Johnny's adventures. They discover that an evil scientist in Johnny's world has plans to use ninja powers for his own evil deeds. So Naruto and Johnny, along with Dukey, have to stop him. They face many challenges along the way, like getting past security systems in the evil scientist's lair using Naruto's stealth skills and Johnny's hacking gadgets.
In the fanfiction, perhaps Johnny gets a disease that affects his superpowers. He used to be able to do all these amazing things, but now he can't. His dog Dukey might be by his side the whole time, trying to cheer him up. The disease could be something that was created by one of his enemies, and now he has to race against time to find a cure before it's too late.
Dumbledore could be an interesting character to focus on in this crossover. He is so wise and experienced in the magical world. When Johnny Test arrives in Hogwarts, Dumbledore would be the one to guide him, while also being intrigued by Johnny's different way of thinking. Dumbledore could see potential in Johnny that others might not, and their interactions could lead to some really interesting plot developments, like Dumbledore using Johnny's ideas to come up with new magical theories or defenses for Hogwarts.
It might be a story where a wizard or witch is a huge Shiba fan and during a routine blood test in the Hogwarts hospital wing, they discover that their love for Shibas is somehow encoded in their blood. This could lead to all sorts of adventures, like finding a secret Shiba - filled magical realm accessible only to those with this 'Shiba - in - the - blood' trait.
Well, it could be about different characters in the Harry Potter universe being put through a series of tests to determine who is the true heir of something. Maybe it's the heir of a powerful magical item or an ancient wizarding family. For example, Harry, Hermione, and Ron could all be candidates. The tests might involve things like solving complex magical puzzles, facing dangerous magical creatures, and demonstrating great magical knowledge.
Well, one possible plot could be that a new spell is discovered which can analyze a wizard's DNA. The main character, perhaps a young Hogwarts student, decides to take the test out of curiosity. It reveals some unexpected heritage, like being related to a powerful but long - forgotten wizard family. This could lead to new adventures as they try to uncover the secrets of their newly - discovered family past.
In a fanfic, the plot could revolve around a mystery in their town. Strange things start happening like objects floating in the air and people's memories being erased. Johnny and Dukey suspect that it has something to do with a new invention by one of the local scientists. As they investigate, they face many obstacles. They get chased by security robots in the scientist's lab. Dukey manages to lead the robots on a wild goose chase while Johnny hacks into the main computer system to find out what's really going on. In the end, they discover that the scientist was trying to create a mind - control device but it went haywire.