Well, it could be about Naruto somehow getting involved with Palkia. Maybe Naruto discovers a new realm where Palkia exists and has to form an alliance with it to fight a common enemy. He might learn some new powers from Palkia that are different from his regular ninja skills.
The fanfiction could center around Naruto being a huge fan of Palkia. He could be on a quest to find Palkia and when he does, Palkia is in some sort of trouble. Naruto then uses his determination and skills to help Palkia out. In the process, they become friends and Naruto gets to understand the power of Palkia better, and perhaps even uses that knowledge to better his own world.
In the 'naruto is palkia fanfiction', perhaps Naruto is transported to the world of Palkia by some strange magic or jutsu gone wrong. There, he has to adapt to the new environment which is very different from Konoha. Palkia could initially be skeptical of Naruto but as they interact more, they realize they can learn from each other. Naruto could teach Palkia about the concept of friendship and loyalty which are strong in the ninja world, while Palkia could show Naruto the secrets of its own power and the mysteries of its world.
Chapter 906, "Big Brother, are you jealous?", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with A few people were somewhat surprised.
Chapter 784, "Slander Brother Yang Without Any Proof?!", is the clearest early answer because it turns Qingyang's situation into a concrete plot event. It opens with Could the person she saw right in front of her have been all an act?"...
Chapter 797, "Bu Fan and Bu Chen", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event.
Chapter 917, "The Civet Cat Replaces the Crown Prince", is the clearest early answer because it turns Mr's situation into a concrete plot event. The chapter gives readers a real answer by opening on Meng slapped the coffee table, his face livid with anger.
Chapter 731, "Ye Chu Died", is the clearest early answer because it turns Ye Chu Died's situation into a concrete plot event. The chapter turns that into something concrete by moving from Dean, can I really not do it? to She'd been acting off these days..
Chapter 635, "Forced Return to the Time-Space Administration", is the clearest early answer because it pushes Zhao Lang into a new phase or setting. It opens with But Pei Ye was much quicker than she had imagined. and closes on I'll join you." Saying so, he eagerly took the lead..
Chapter 609, "What identity would make the Crown Prince barbecue!", is the clearest early answer because the hidden truth stops feeling like mere subtext. The chapter turns that into something concrete by moving from Jiang Yan: "!!!" Right, the Cat and Mouse Game was over, they had...
Chapter 489, "Has She Been Morally Kidnapped?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with Yeah," Nina nodded, "I thought you looked pretty imposing, must be... and closes on However, Nina wasn't willing to give up just yet;
Chapter 634, "All Villains", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. It opens with But, luckily a few days ago, Jiang Li managed to expand his team from...
Chapter 788, "Don’t be so fierce, I'm scared", is the clearest early answer because it turns Lu Yafei's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Song Xue covered her mouth in shock. and follows through with I hope it can help me atone..