A Harry Potter - Godzilla bloodline fanfiction could be really wild. It might involve a character in the Harry Potter universe having some sort of connection to Godzilla's bloodline. Maybe a wizard discovers an ancient magic related to Godzilla's power. This could lead to all sorts of new magical abilities or threats in the wizarding world.
Yes, there might be. The Naruto and Godzilla universes are both very popular, and it's not uncommon for fans to create crossover fanfictions. Some fans might be interested in imagining Naruto in a scenario related to Space Godzilla, perhaps with Naruto having to face this powerful kaiju or even teaming up with it in some strange alternate universe plot.
Another possibility is that Godzilla somehow ends up in the Naruto world. The shinobi might initially see it as a great threat, but Naruto could try to communicate with it using his ability to sense emotions. Maybe Godzilla is there because it's being chased by an even greater enemy from its own world, and Naruto and his friends decide to help it.
One interesting Naruto and Godzilla fanfiction could be where Naruto gains the ability to summon a miniature Godzilla. It could add a really unique dynamic to his battles, like when he's facing powerful enemies in the Naruto universe. He could use Godzilla's raw power combined with his own ninja skills.
There are also fanfictions where a bloodline is created through some sort of experimental jutsu. For example, a bloodline that allows the user to transform into different elements at will. This would give the character an edge in combat as they could adapt to any situation by changing their form.
It could blend the two universes by having Godzilla - like creatures be the result of dark magic experiments gone wrong in the Potter universe. Or perhaps the magic in the Potter world could be used to control Godzilla's power. For example, a powerful wizard might use a spell to direct Godzilla's atomic breath to defeat Voldemort.
Well, one way is through the concept of chakra. In the Naruto world, chakra is the life force. You can make it so that Godzilla has a connection to chakra. Maybe his atomic breath is powered by a special type of chakra. This would tie the two worlds together in a cool way.
Naruto would probably be both amazed and a bit scared at first. But being Naruto, he would quickly jump into action. He might try to use his rasengan against Godzilla, thinking it could do some damage. However, he would soon realize that Godzilla is much more powerful than he initially thought and would have to come up with a different strategy, like using his speed to avoid Godzilla's attacks and find its weak points.
The knight bloodline could be integrated as a foreign power that was brought to the Naruto world long ago. Maybe a group of warriors from another dimension with the knight bloodline came and settled, and over time their bloodline got diluted but still resurfaces in certain individuals.
He might use some special jutsu or seals. For example, he could use a sealing technique to suppress the signs of his bloodline. This way, others wouldn't be able to detect it through normal means like sensing chakra.