One common theme could be adventure. Given the nature of the Madagascar setting, fanfics might explore new adventures that Marty and Lemon get into. Another could be friendship, as they are characters from the same universe and their relationships can be further developed in fan - created stories.
There are various places to find 'Madagascar Marty Lemon' fanfics. You could start by checking fanfiction.net. There might be some interesting stories there created by fans who are passionate about these characters from Madagascar. However, the availability and quality can vary greatly.
I'm sorry, I don't actually know the specific details of the story of Shirley and Marty in this 'Shirley and Marty an unlikely love story'. Maybe it's about two people from different backgrounds or with different personalities who fall in love unexpectedly.
I'm not sure specifically which 'Marty's Mom' story you are referring to. There could be various fictional or real - life inspired stories with that name. It could be about Marty's relationship with his mom, some family - related events, or something unique to a particular book, movie or personal account.
There could be many fanfictions about Baby Alex from Madagascar. It might focus on his early days in the zoo, his interactions with other animals there. For example, it could describe how he played with the other young animals, or how he first discovered his love for dancing.
Well, Saving Marty isn't a graphic novel. Usually, a graphic novel has a lot of illustrations and visual elements, but Saving Marty doesn't have those typical features.
Madagascar is purely fictional. The story and characters were invented by the creators to provide an enjoyable and imaginative adventure for the audience. There's no real-life basis for it.