1. Jiraiya, one of Konohagakure's famous ninjas, has students like Nagato and the Fourth Hokage, who both learned the Rasengan from him. Jiraiya even used the Rasengan as the engine for a boat. His abundant chakra allows him to use the Rasengan multiple times.

2. Naruto loves eating ramen since he didn't have a family to cook for him when he was young. He frequented Ichiraku Ramen for handmade ramen when he had money, and ate instant ramen at home when he was broke.

3. The Fourth Hokage, Minato, developed the Flying Thunder God Technique. Naruto's mother, Kushina, could suppress tailed beasts due to her Uzumaki bloodline. She mastered the Nine-Tails Chakra Mode with Minato's help, but didn't form a friendship with the Nine-Tails. The Flying Thunder God Technique combined with the Rasengan can achieve the effect of the Rasenshuriken.

4. Konohamaru, Naruto's disciple, learned the Rasengan early on and impressed his teacher by defeating one of Pain's minions with it. However, in Boruto: Naruto Next Generations, Konohamaru seems less skilled with the Rasengan and sometimes uses it to show off.

5. In a Naruto Shippuden movie, Naruto and Sakura encounter an alternate world where a different version of Naruto desires to destroy Konoha. He uses a giant Rasenshuriken to achieve this goal, causing destruction in the sky over Konoha.