I'm not sure specifically about this 'tmnt mikey gets double mutated fanfiction'. But generally in TMNT fanfictions, double mutation could lead to some really wild and unique abilities for Mikey. It might make him even more powerful or give him some strange new forms.
He might gain new physical abilities, like enhanced strength or speed.
In this fanfiction, Mikey might gain new and unexpected powers. Maybe he could develop the ability to control certain elements like water or fire, which would add a whole new dynamic to his character and the story.
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.
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.
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.
Well, first, you should check the major fanfiction platforms. AO3 is known for having a wide variety of fanfictions, so it's a good place to start. Enter the title in the search box carefully. FanFiction.net is also a possibility. Sometimes, smaller, more niche TMNT - focused fanfiction communities might also have it, but those can be harder to find. You might need to do some more in - depth searching on TMNT fan forums to see if anyone has a link or knows where to find it.
It could be Shredder. He's always been after the turtles.
Well, his brothers would probably go on a wild rescue mission. They'd search every nook and cranny of the city. Maybe they'd get some help from April and Casey too.
One possible scenario could be that Mikey gets hurt during a fight with the Foot Clan. Maybe he underestimated an opponent and got a nasty cut on his arm. His brothers would then rush to his side, with Donnie trying to patch him up as quickly as possible while Leo and Raph stand guard, ready to fend off any further attacks.
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.