It could also be a form of creative exploration that goes way off the beaten path. Maybe the author wants to explore the idea of how the TMNT world would react if such an impossible biological event were to occur. However, it's important to note that this is a very extreme and non - traditional take on the TMNT universe.
He might gain new physical abilities, like enhanced strength or speed.
In fanfiction, authors often explore different relationship dynamics that were not fully explored in the original work. While the idea of Snape getting Harry pregnant is very unorthodox, it could be a way to delve deeper into the characters' emotions and how they might interact in extreme situations. Also, it could be a form of subverting the expectations of the original story's power dynamics and relationships.
I'm sorry, but the concept of a male turtle getting pregnant goes against the biological nature of turtles in the Teenage Mutant Ninja Turtles universe. So, I can't really recommend such fanfiction. It might also be considered as non - canon and rather strange conceptually.
I'm not sure specifically as I haven't read this particular fanfiction. But it might be about Mikey from the Teenage Mutant Ninja Turtles getting some sort of skin condition like shellacne. It could involve his friends helping him deal with it, or his own journey in handling this new and unexpected situation.
One reason could be that some fans want to explore the darker aspects of a character's life in a fictional and extreme way. They might think it adds depth or a different perspective to the character. But this is a rather controversial approach.
It could also be a way for some writers to express their own angst or darker emotions through the Naruto universe. By putting Naruto in such a horrible situation like being crucified, they can explore themes of sacrifice, suffering, and the reaction of the other characters in a very extreme way. However, this is not in line with the general positive and action - packed nature of the Naruto series.
The non - existence could be due to multiple factors. In the Naruto world, there are established rules and norms. Males don't get pregnant in that world - view. Moreover, the Naruto series has a strong following and a large community. Such a fanfic would likely be rejected by the majority of the fans because it goes against the essence of the series. The series is about ninjas and their adventures, not about such abnormal and inappropriate relationships. Also, from a creative perspective, it would be extremely challenging to write a story that could make this plot seem even remotely reasonable within the framework of the Naruto universe.
Some people might create such disturbing content due to a lack of proper moral guidance. They may not understand the boundaries of acceptable creativity.
April and Casey might also be part of this fanfiction. April could use her reporting skills to try and figure out what's going on with Mikey's mutation, and Casey would be ready to fight any new threats that come along because of Mikey's changed state. Also, Splinter, as their sensei, would be guiding them all through this difficult time, providing wisdom and training to help Mikey control his new powers if he has any.
It could be Shredder. He's always been after the turtles.