Well, one common theme could be self - discovery. Both characters might learn new things about themselves through their relationship. There could also be a theme of power dynamics, especially if their abilities or statuses in their respective worlds are different. Additionally, themes of loyalty and betrayal might come into play, as their relationship might be tested in different situations.
If such a fanfic exists, it could potentially have themes of friendship turned into something more, as Killua and Gin might start from a basic acquaintance or even rivalry and develop deeper feelings. Another theme could be adventure, as they might go on some sort of journey together that changes their relationship.
I'm not sure if there is a specific fanfic with that exact title. Fanfic availability can vary greatly depending on the fandom platforms and the creativity of the writers. You might need to search on popular fanfic websites like Archive of Our Own or Fanfiction.net to see if such a story exists.
I haven't come across a 'Giant Dick Killua x Gon Fanfic'. Fanfics usually range from various genres like adventure, friendship - enhancing, or alternate universe stories. A title like this seems rather out of the ordinary and not in line with the general positive and respectful nature of most fan - created works. So, it's likely not a common or widely available one.
Another common theme is betrayal. Given their complex relationship in the source material, fanfic may delve into how betrayal could play out between Gin and Sherry. It could be Sherry's betrayal of the organization which Gin is a part of, or vice - versa. And this can create a lot of drama and conflict in the fanfic. Also, the theme of redemption can be present. For instance, if one of them has done something wrong, the fanfic might explore their journey towards redemption in relation to their relationship with the other.
One common theme is the exploration of power dynamics. Hisoka is much more powerful and experienced, and Killua is a prodigy. Their relationship often involves Hisoka testing Killua's limits. Another theme is the idea of redemption or change. Hisoka is a rather amoral character, and in some fanfics, Killua might influence him to change for the better.
In 'killua x gon fanfic', the theme of sacrifice often appears. Killua or Gon might sacrifice something for the other's well - being. Another common theme is the power of their bond. It's often shown as something that can overcome great obstacles. And there's also the theme of shared dreams. They both have goals as hunters, and fanfics may explore how they pursue these dreams together or support each other in achieving them.
Adventure is also a popular theme. They go on quests together, facing powerful enemies and exploring new places. This allows for a lot of action and character development.
Another theme is power. Gin has his own set of powers and Ichigo is also very powerful. Fanfics might explore how their powers interact, like in a battle scenario where they have to team up against a common enemy. It could be a really intense and action - packed theme in the fanfics.
One common theme is the exploration of their past relationship. Since they have a history together in the original story, fanfics often delve into what might have happened between them before. Another theme could be the conflict of their loyalties. They are on different sides in the story, and this creates an interesting dynamic to explore.
A frequent theme is the redemption arc. Maybe Kira is trying to redeem himself in Gin's eyes or vice versa. There's also the theme of power struggle. Since both characters can be quite powerful in their own ways, fanfics might explore how they handle the power dynamics between them. And sometimes, there's a theme of hidden feelings, where they have unspoken emotions for each other that slowly surface throughout the story.
If such a fanfic exists, a common theme might be the anticipation and preparation for the new life. This could include things like decorating a nursery, choosing baby names, and dealing with the emotions of impending parenthood.