The theme of adventure is very prominent. The characters usually embark on some grand quest or face a big threat together. It's about their journey through this new, combined world. Also, there can be a theme of self - discovery. As the characters interact with new people, they learn more about themselves and their own capabilities. For example, a character might discover a new side to their power when working with someone from another story.
The 'big four' could refer to four main characters, perhaps from different stories or universes that are grouped together for some reason in the context of watching 'Tangled' fanfiction. For example, it might be four popular Disney characters who are fans of 'Tangled' in a fan - created scenario.
One common theme is the combination of different powers. For example, when the Fantastic Four cross over with other superhero groups, like the X - Men, you see how the mutant powers interact with the Four's powers. Another theme is facing a greater threat together. In many fanfics, a powerful villain forces the different groups or characters to team up.
One common theme could be the exploration of different character relationships within the harem. For example, how the different characters interact with the main character who has a 'big cock' (in a non - vulgar, more of a fictional characteristic sense). Another theme might be the power dynamics, as the main character's unique trait could give them an edge in the harem setting.
I've read 'Mystical Alliances in the Big Four Crossover'. This one is really detailed. It delves deep into the backstories of the characters from the big four and uses that to build a complex and fascinating crossover world. The author has a great way of bringing out the unique abilities of each character and making them work together in unexpected ways. There are many plot twists and turns that make it a very enjoyable read.
Adventure is also a big theme. The characters embark on new quests in unfamiliar settings. For instance, if Naruto is in the Mushroom Kingdom, he has to figure out how to deal with Goombas and Koopas while still maintaining his ninja skills. And for Mario in the Hidden Leaf, he has to adapt to the more dangerous and stealth - based ninja world. There's also the theme of power, as they combine their unique powers to face challenges.
Another theme is power and control. In the Matrix, there's the idea of the machines controlling everything, while in Naruto, there are different power structures like the ninja villages. When these two worlds cross over, the theme of who has power and how it's controlled becomes very interesting. For example, how would the ninja deal with the all - powerful machines of the Matrix?
One main theme is the clash of different cultures. The refined and pampered world of the Aristocats meets the rough and battle - ready world of the Warriors. Another theme could be friendship. As the characters from both groups come together, they have to learn to be friends and support each other.
Friendship and cooperation are big themes. Naruto, being a character who values friendship highly, forms bonds with witches in these crossovers. They have to learn to trust each other despite their differences. Also, identity is a theme. Witches may have to hide their true identities in the Naruto world, and Naruto characters might question their own identities when exposed to the new and strange world of witches.
One main theme is the clash of different belief systems. Lucifer represents a very different view of good and evil compared to the Shadowhunters. Another theme is power dynamics. The powers that Lucifer has and the powers of the Shadowhunters are very different, and when they come together, there's a lot to explore about who has more power in different situations.
Another theme is cultural exchange. The RWBY world has its own set of values, cultures, and technologies, and Touhou has its own very distinct world of youkai and magic. Fanfictions often show how the characters from each world learn about and adapt to the other's culture. For example, a RWBY character might be fascinated by the way magic is used in Touhou. It can be really interesting to see how they incorporate elements of each other's worlds into their own understanding. And this can also lead to some character growth as they expand their perspectives.