As Naruto's best friend, he followed Naruto through his growth and struggles at every turn. As an adult, Shikamaru works as Naruto's second in.
Hokage Naruto is extremely powerful, he has Six Paths Chakra, Ashura Chakra, Kurama 100%, Chakra of all the tails! Adult Sasuke has Six Paths Chakra, Indra.
Naruto has undergone serious growth from a scruffy nobody that barely knows how to throw a proper punch to a true shinobi. Everything in Naruto's growth has .