The theme of self - discovery also pops up. When a character is hurt, it can lead to them re - evaluating who they are. For instance, Dib might question his obsession with Zim after getting seriously hurt during one of their encounters. And through the comfort offered by someone else, he might start to see things in a new way.
One great Invader Zim Hurt Comfort fanfiction is 'Healing Wounds'. It focuses on Dib being injured during one of his attempts to expose Zim, and Zim, surprisingly, helps him. The story does a wonderful job of showing their complex relationship in a new light.
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.
A really interesting 'Invader Zim female Zim fanfiction' is 'Zim as a Girl: The Alter Ego'. This story plays around with the idea of Zim having a female alter ego. It's fascinating to see how the other characters react to this new version of Zim. Additionally, 'Female Zim in the Human World' is a great read. It focuses on how Female Zim adapts to human society, with some really funny moments like her trying to understand human fashion and social norms.
One common theme is the clash of cultures. Naruto's world of ninjas with its honor and traditions is very different from Zim's world of aliens and wacky technology. So, stories often play with how these two different cultures interact.
One type of fanfiction could involve the reader being an unwitting accomplice in one of Invader Zim's crazy schemes while Tallest Red is observing from afar, amused by the chaos. Maybe the reader is a human who has some unique ability that Zim wants to use for his own purposes, and Tallest Red is just there to see how it all unfolds.
I'm not sure if there is specific 'invader zim gaz pregnant fanfiction' available. Fanfiction can be quite diverse and spread across many platforms. You might need to search on popular fanfiction websites like Archive of Our Own or FanFiction.net to find out.