One main theme is usually the clash of different fighting styles. Naruto has his ninja skills and the Smash Bros. characters have their own unique moves. Another theme could be friendship, as Naruto might form bonds with other characters in the brawl.
Well, a really engaging plot point often involves Naruto bringing his unique ninja techniques into the Smash Bros arena. For instance, his ability to use chakra in a world full of characters with different power sources. Also, the idea of Naruto trying to understand the Smash Bros power - ups and how they can enhance his abilities or those of his newfound allies. And then there's the whole concept of Naruto facing off against characters with completely different moral compasses than his own, like some of the more villainous Smash Bros characters.
There are several good ones. For example, 'Naruto in Super Smash Bros: The Ultimate Battle'. This fanfiction details Naruto's entry into the Super Smash Bros tournament. He uses his shadow clones and rasengan in creative ways against opponents like Samus and Kirby. The author does a great job of blending the Naruto universe with the Super Smash Bros gameplay elements. It's full of action - packed battles and some really interesting character interactions.
However, you can't discount characters like Kirby in this context. Kirby has the ability to copy the powers of his opponents in the Super Smash Bros games. If he were to face Naruto characters, he might be able to copy their jutsu and use it against them. Also, his floating ability and quick attacks make him a formidable foe. So, it really depends on how the author of the fanfic wants to balance the powers and abilities of the different characters.
Well, you could have a story where a new villain emerges in the combined Naruto - Super Smash Bros world. This villain has the power to steal the abilities of the characters. Naruto and his comrades, along with the Smash Bros characters, have to team up to stop this villain. They go on a journey across different stages of the Smash Bros game to find the source of the villain's power and defeat him. Along the way, there are many battles, character development, and some humorous moments as the two different groups of characters interact.
It's likely that Naruto himself could be very powerful. His ability to use chakra and perform powerful jutsus like the Rasengan and Sage Mode would give him an edge. He could also use his shadow clones to confuse opponents.
Perhaps there's a tournament in the Smash Bros world that Naruto enters. He's an unknown quantity at first, but as he battles, he shows off his ninja skills. The other fighters are amazed and start to study his moves. This could lead to some interesting training sessions between Naruto and characters like Captain Falcon, where they exchange fighting tips and Naruto learns about high - speed racing attacks from him.
There are quite a few 'naruto super smash bros brawl fanfic' out there. For example, 'Naruto in the Brawl World'. In this fanfic, Naruto is summoned into the Smash Bros. brawl world by some mysterious force. He quickly realizes that he needs to master new combat techniques to compete. The fanfic details his journey of learning about the Smash Bros. mechanics while still relying on his ninja abilities. It also has some great character interactions between Naruto and the Smash Bros. regulars, making it a fun read for fans of both Naruto and Super Smash Bros.
Another idea is that the Smash Bros characters are transported to the Naruto universe. They'd have to adapt to the ninja world. For example, Mario might try to use his jumping skills on the rooftops of Konoha, while Link could use his swordsmanship against ninja foes. It would be really interesting to see how they interact with the Naruto characters and learn about chakra.