what if naruto trained seriously

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.

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.

In the novel, scouts were usually responsible for infiltration and reconnaissance missions, so their combat skills were very important. Generally speaking, scouts would undergo in-depth combat training to improve their combat effectiveness. If a Scout was well trained, his combat ability should be very high. It depends on the specific situation. However, if he could take on 5 people at once, then this Scout would definitely be an amazing warrior with extremely high combat power. The answer to this question depended on the Scout's combat skills, physical fitness, combat strategy, and other factors. It was impossible to give an accurate answer simply. However, in general, a seriously trained Scout should be able to take on several people at once in most situations.

Well, Naruto would probably gain some really unique magical abilities. Fairy Tail mages are known for their diverse magic, and Naruto could combine his chakra skills with something like Fire Magic or Celestial Magic. He might become even more powerful in combat, with new ways to attack and defend.

Naruto would gain better combat awareness. Kurama's experience in battles can be passed on to Naruto. He'll be able to read his opponents better, know when to attack and when to defend. This will make him a more formidable opponent in combat situations.

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.

It could lead to Naruto developing much stronger abilities earlier and having a different path of growth.

It could completely change Naruto's character and abilities. Madara's teachings might lead Naruto down a darker path or give him incredibly powerful skills.

It could lead to Naruto mastering powerful wood-style jutsus and having a deeper understanding of the Senju heritage.

In this fanfiction scenario, Kurenai could also help Naruto with his emotional control. Naruto has a strong will but sometimes his emotions can get the better of him. Kurenai, with her calm and collected nature, could teach Naruto how to stay focused and in control during intense situations. For example, she could use her own experiences to show Naruto how to channel his emotions into strength rather than letting them cloud his judgment. This would not only improve his combat abilities but also his decision - making skills.