Board Thread:Specific Characters Qualification Exam/@comment-25152698-20141211020520/@comment-25152698-20141213164404

If he's 7, he hasn't really been training or anything for more than 3 years at the time. And Sasuke didn't master anything, your confusing him with Itachi. Yeah Sasuke was a genius, but not on the level of his older brother.

Also, the Fire Release: Great Dragon Fire Technique varies greatly from the original Dragon flame jutsu Sasuke used against Orochimaru. Go to the mother wiki page, look at the users for it. All Uchiha. But then again, since the others are only game users, I suppose Sasuke could have made the technique himself.