One possible plot could be Naruto making great leaps in his ninja skills. He might learn powerful jutsu more quickly under Jiraiya's intense training regime. For example, he could master new forms of Rasengan faster and also gain better control over his chakra.
Naruto would likely become more disciplined. Jiraiya's strict training would force Naruto to focus and follow a routine, which is different from his usual impulsive self.
It could lead to Naruto becoming even stronger and more skilled than in the original story. Jiraiya's training methods might unlock new powers for him.
Jiraiya could also train Naruto seriously in fanfiction through intense physical conditioning. He might make Naruto run long distances, climb mountains, or swim across large bodies of water. This would build Naruto's stamina and strength, which are crucial in battle. Additionally, Jiraiya could teach Naruto advanced ninjutsu techniques, like new ways to use his Rasengan or how to combine different elemental jutsus.
In the 'naruto trained seriously fanfiction', Naruto could be training with his friends in a more serious way. They might form a special training group where they push each other to their limits. For example, they could be training to improve their teamwork and combination jutsus. Naruto might focus on his speed and strength training while also learning how to better coordinate with his friends' abilities, like Sasuke's Sharingan - based attacks and Sakura's medical and combat skills.
One possible plot twist could be that Yugau Uzuki has a secret jutsu that she passes on to Naruto which changes the way he approaches battles. For example, it could be a space - time related jutsu that allows him to surprise his opponents. Another twist might be that Jiraiya discovers a hidden power within Naruto that is related to an ancient prophecy that neither of them were aware of before. This could lead Naruto on a new quest to understand and master this power.
Well, Naruto with the Rinnegan trained by Jiraiya would be extremely powerful. Jiraiya could teach Naruto unique ways to use the Rinnegan's abilities. Maybe Naruto would combine Sage Mode with the Rinnegan powers, creating new and unbeatable jutsu. He could also use the Rinnegan's ability to see chakra flow to better understand his opponents and counter their attacks more effectively.
Well, if Jiraiya had trained Naruto from the start, Naruto might have developed a more strategic mindset and better control over his chakra. Also, he could have learned some secret techniques that Jiraiya knew but never got the chance to teach him.
Obviously, Naruto himself would be a key character as the story focuses on his serious training. Kakashi could also be important. He might be Naruto's guide in this new training regime, sharing his own experiences and wisdom to help Naruto grow stronger.
Naruto would likely become more well - rounded. With Yugau Uzuki's training, he might develop a deeper sense of self - awareness. Jiraiya's training is more about combat and worldly knowledge. So combined, Naruto would be more in tune with his inner self and also be a stronger fighter. He could become more strategic in battles as he would have two very different perspectives to draw from.