One interesting Gir crossover Invader Zim fanfiction could be one where Gir teams up with Dib to stop some new alien threat that neither Zim nor the other regular villains can handle. In this story, Gir's unpredictable and silly nature might add a lot of comical elements to the usually tense relationship between Dib and Zim.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can easily search for Gir crossover Invader Zim stories. Just use the search bar and type in the relevant keywords.
The absurdity. In the 'Invader Zim' universe, Zim is this bumbling alien who thinks he's much more competent than he actually is. So when it comes to 'Manifest Doom' fan fictions, his over - the - top plans and Dib's attempts to stop him create a lot of comical and exciting situations.
Sure. One great 'Invader Zim Manifest Doom' fan fiction is 'The Doom of Dib'. It really delves into the chaos that could potentially unfold in the Invader Zim universe. Another one is 'Zim's Manifest Doom Plan' which has some really interesting takes on how Zim might bring about a sort of doom in his own bumbling yet somewhat effective way. And 'Dib's Resistance Against Doom' shows Dib's attempts to stop whatever doom Zim is cooking up.
Often, there's a theme of self - discovery. As Female Zim is a different take on the character, she might be on a journey to figure out who she is in this new form. Also, the theme of adaptation is common. Just like in the original where Zim has to adapt to Earth, Female Zim may have her own unique ways of adapting, whether it's to Earth's environment or to the reactions of the other characters around her. And there's also the theme of power. How does being female change Zim's perception and use of power? This is something that many fanfictions like to play with.
It depends on how you look at it. Some fans consider the comics canon because they continue and enrich the storylines from the show. However, others might have reservations based on personal interpretations.