Yes, in some fanfictions, Naruto can be depicted as having the ability to beatbox. Fanfiction often takes creative liberties with characters, and this can be a fun and unique addition to his skill set in those fictional stories.
If Naruto were to beatbox in fanfiction, it could be a great way to show his creativity. He might use his chakra control to add unique effects to his beatboxing, like making the sound waves visible or using them in combat in a really creative way. Also, his competitive nature would make him strive to be the best beatboxer in his fictional world, leading to some interesting rivalries with other characters who are also into music or sound - based abilities.
You could try searching on local NY music blogs or websites dedicated to beatboxing. They might have covered the story of the 'ny demons' if they are well - known in the NY beatbox community.
The 'ny demons beatbox true story' is unknown to me without more context. However, generally, a true story about a beatbox crew might include their origin. Perhaps they started as a small group of friends who loved beatboxing in the streets of NY. They practiced hard, shared their music on social media, and gradually became known in the local and maybe even wider beatbox scene. Their story could also involve interactions with other artists, and how they contributed to the beatbox culture in NY.