Jiraiya taught him
When Naruto became a Sage.
no jiraiya is he is one of the three sannin (shinobi three) however he does teach naruto some toad jutsus and naruto becomes a toad sage.
sage Naruto does NOT EXIST ON MUGEN
itachi is better than naruto without sage mode but with sage mode naruto is stronger and faster
There is nothing i can say about sage naruto in one of the video games. i can tell that there will be a naruto five and six, i don't know if they have sage naruto in them.
Naruto becomes sage at the time when Pain invades Konoha.
Naruto becomes a sage after he finds out that the pervy sage had died nd the elder frog that trained him uses toad oil and naruto becomes a sage he uses this power to fight pain,
no but there is a naruto setting when he learns to use the sage mode
After Jiraiya died, the toads took over Naruto's training. The took him to the toad mountain and attempted to teach him natural power. After failing miserably for a while he finally got it, as always.
naruto because hes in sage mode (sage mode is when u become 10 times stronger)
Naruto does not combine the sage mode with the Kyuubi`s eye because when naruto went through the sage mode, he turns little bit into a frog. You should read more Naruto Shippuuden manga chapters.
Naruto