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.
Another theme is the idea of friendship or rivalry. Given the strong - willed nature of both Naruto and Zim, they could either become friends (in a very strange way) or bitter rivals. Some fanfictions explore how they might compete or cooperate depending on the situation. Also, the theme of saving the world or at least their own little corners of it is quite common. Whether it's Naruto protecting the Hidden Leaf or Zim trying (and failing most of the time) to take over Earth, these goals often get intertwined in the fanfiction.
The exploration of power is also a major theme. Naruto has his chakra and various jutsus, while Zim has his alien gadgets. Fanfictions might show how these powers are used when the two universes collide. It could be a matter of one character being in awe of the other's power, or they might try to find a way to combine their powers to achieve a common goal. There's also the theme of misunderstandings due to the different natures of their worlds, which often leads to comical or tense situations in the stories.
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 prevalent theme in 'Invader Zim baby fanfiction' is the idea of growth and change. Even as a baby, Zim might still have his grand plans of conquering Earth, but he has to adapt his methods. There's also often a theme of protection. Characters like Dib might see the baby Zim as an even greater threat and try to protect the world from him, or in some cases, protect the baby Zim from other threats in the universe.
One common theme is the struggle for power. Zim, as a vampire, often tries to gain more power, whether it's over Dib or in the vampire world itself. Another theme is identity. Zim has to figure out who he is now that he's a vampire. Is he still the same invader or has he changed?
Another theme is the relationship between Dib and Zim. In many fanfictions, their rivalry either intensifies or takes on a new form. It could be that they have to team up against a new threat that emerged because of the Florpus.
One common theme is the idea of unlikely pairs falling in love. Given the oddball characters in 'Invader Zim', it's often about characters who you wouldn't expect to get together, like Zim and a human. Another theme is the struggle between different species and cultures in the context of love. For example, an Irken and an Earthling trying to understand each other's values while being in love.
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 common theme is the struggle for acceptance. OCs often face challenges in being accepted by the existing characters in the 'Invader Zim' universe, whether it's by the Irkens or the humans.
One common theme is often the power struggle. The Tallest Dark Princess is usually a very powerful character, and in fanfiction, there can be a lot of back - and - forth about power dynamics with Invader Zim. Another theme is the exploration of the strange and otherworldly nature of the Invader Zim universe. Writers might use the character of the Tallest Dark Princess to delve deeper into the unique aspects of this universe.
One common element could be the suffering of the main characters like Zim or Dib. Maybe Zim fails in his invasion plans in a particularly painful or humiliating way for him, which is a form of hurt. Or Dib could be constantly ridiculed and isolated, which causes him emotional pain.
In 'invader zim and gaz lemon fanfic', a recurring theme could be the power dynamic. Zim has his alien powers and Gaz has her own unique skills and attitude. Writers may play with how these two interact in terms of power, whether it's a struggle for control or a mutual respect for each other's abilities. Additionally, there might be a theme of self - discovery. As they interact, both characters could learn more about themselves and their place in the world around them.