Well, one key element is the transformation into human forms. It often leads to exploring how they adapt to human characteristics like emotions, relationships, and social norms. For example, in some fanfics, Mikey might struggle with the concept of human privacy while Leatherhead could be fascinated by human technology.
There are definitely some out there. However, the quality can vary greatly. Some might focus more on their friendship with a hint of something more, while others could be full - on adventure stories that also explore their relationship in a different way. It really depends on what you're looking for in a fanfiction.
Sure was! TMNT originated as a comic. The comic introduced the characters and their adventures, which then led to its success in different forms of entertainment. The original comic had a significant impact on the franchise as a whole.
One great Mikey and Leatherhead human fanfiction is 'The Bond Beyond Species'. It shows an interesting take on their relationship in a human - like world, with lots of adventure and character development.
The publishing of TMNT comics has involved multiple companies. Archie Comics has also been involved in publishing TMNT comics at some point. The landscape of publishers can change based on licensing and market dynamics.