In a 'Naruto Needs Help' fanfiction, Naruto could get help from unexpected sources. The tailed beasts themselves could come to his aid. Since Naruto has a connection with Kurama, the other tailed beasts might sense his distress and offer their power. Also, characters from other villages. For example, Killer Bee could teach Naruto some new techniques related to the tailed beasts' power, or Temari could use her wind techniques to assist in a battle where Naruto is outnumbered.
One possible plot could be Naruto facing a new and powerful enemy that he can't defeat alone. Maybe an ancient evil has been awakened and Naruto needs to seek help from old foes turned allies, like Gaara and Sasuke. He might also need to learn a new jutsu or power in order to stand a chance against this threat.
The magical creatures could play a role in helping Harry. For example, the centaurs with their deep understanding of the stars and magic could offer their wisdom. The house - elves, like Dobby (if he's alive in the fanfic), might use their unique magic to assist Harry in a time of need.
Tsunade could play a crucial role. She could use her vast knowledge of resources and economics to secure the funds and materials needed for the fleet. Jiraiya, if he were still alive, would bring in his worldly knowledge and connections from his travels. He could help Naruto find rare and valuable materials from far - flung places for building a truly remarkable fleet.
Sasuke could be one to help. Given their history and Sasuke's intelligence, he might contribute some knowledge about energy manipulation which could be useful for the lightsaber's power source.
Iruka could help. He's always been there for Naruto. He might know some old tales about mysterious eggs and give Naruto some useful tips.
Even Kakashi could lend a hand. He might not seem like the gardening type at first, but he has a lot of knowledge. He could help Naruto protect the garden from potential threats, like thieves or pests that might be more dangerous in the ninja world, using his ninja skills.
Sasuke could be one of the people to help. He has a deep understanding of weapons and combat. He might offer some advice on how to make the blade sharper and more effective in battle.
Sakura could be a great help. Her medical skills could come in handy if Naruto gets injured during his battles or difficult encounters while trying to free the tailed beasts. Also, her combat skills have improved over time, so she could fight alongside Naruto.
Kakashi could also be a great help. With his vast experience and wisdom, he could guide Naruto in understanding the implications of becoming a new species. He might be able to teach Naruto how to control any new powers that come with the transformation and how to deal with the potential social isolation.
Jiraiya could also be involved. Jiraiya, being Naruto's mentor, has a vast knowledge of different jutsus. He might have come across some ancient scrolls or techniques that are related to the creation of Kirin. He could guide Naruto in understanding the more spiritual and chakra - flow aspects of creating such a powerful jutsu.