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The Great Ball Rasengan is a technique created by Naruto Uzumaki while training in the time skip with Jiraiya. Although this technique requires Naruto to use a shadow clone, the result is a larger ball of condensed Chakra that is much more powerful than a normal Rasengan. Naruto has only shown this jutsu once in the entire series. It is used in the fight against Itachi Uchiha in which Naruto lands a direct hit (with help from Kakashi using a shadow clone). It deals astounding damage to the area and the target but takes a lot out of Naruto (most likely due to the incredible amount of chakra used). Ever since it has not been shown so far.