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 friendship. When Mario meets characters from different franchises, they often have to work together. In a Mario and Zelda crossover, Mario and Link may start off as strangers but quickly become allies through their shared goal of defeating the evil force. They learn about each other's strengths and weaknesses and form a bond. And in a crossover with Pokémon, Mario might make friends with Pokémon trainers and Pokémon alike.
It could be Bowser who has somehow gained the power of a powerful ninja jutsu. He uses this new - found power to take over both the Mushroom Kingdom and start invading the Naruto world. His fire - breathing ability combined with ninja techniques would make him a formidable foe for Naruto and Mario.
A frequent theme is adventure. They embark on a journey either in the Mushroom Kingdom or the Hidden Leaf Village. They face various obstacles and enemies together. Also, the theme of self - discovery can be present as they learn from each other's cultures and abilities. Mario might discover his inner ninja, and Naruto might learn about the simplicity and fun of Mario's world.
A great plot could involve a new threat that is a combination of the dark forces from both universes. Naruto and Mario find themselves in a strange new dimension where the rules of both their worlds blend. They must learn to trust each other and combine their unique skills. For example, Mario's invincibility star could enhance Naruto's speed and strength during battles, and Naruto's sage mode could help him sense hidden traps in the Mushroom Kingdom like he does in his own world.
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?
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.
The theme of discovery is also present. Mario discovers the Pokémon world and its unique creatures, and Pokémon characters might discover new elements in the Mushroom Kingdom. For example, they might find new power - ups or hidden areas that are unique to the Mario universe. This exploration of new things is exciting for the readers.
If it's a crossover with Final Fantasy, Cloud Strife could be a main character. He could bring his sword - fighting skills to the Mario Party world. His serious and brooding personality would contrast with the more light - hearted Mario characters, creating some interesting interactions during the story and mini - games.
Another option could be an evil version of Princess Peach. She could be possessed by some dark force. This would be a very interesting antagonist as Mario and Luigi would be hesitant to fight her at first because of their loyalty to the real Peach. But as she causes more and more chaos, they'd have to find a way to save her and the kingdom without harming her.
Once upon a time, Mario found himself in the magical world of MLP. He was quite confused at first, with all the colorful ponies and floating castles. But being the brave hero he is, he decided to explore. He met Twilight Sparkle, who was intrigued by this strange new being. Mario showed her his jumping skills, and Twilight was amazed. They then went on an adventure together to find a way to send Mario back to his world, facing all kinds of challenges along the way, from evil magic spells to tricky terrains.