Board Thread:Theories and Speculation/@comment-24824859-20150704165201/@comment-4912646-20150705173436

JOA20 wrote: The main problem is that Madara and Naruto never created new ones to substitute those they lost (Obito isn't in the list since he had all the TSBs until he lost the tailed beasts to the Alliance in the tug-of-war). Even more than a decade later, Naruto's 6PSM had zero TSBs, meaning that he lost all TSBs against Madara, Kaguya and Sasuke. Actually, Obito did lose one of his Truth-Seeking Balls (the one behind his right hand) when he converted it into chakra receivers. A lot of people missed this the first time through, myself included, but it's consistent in every panel after he creates the receivers. And Naruto still had three balls left after his fight with Sasuke, so why he doesn't ever use them after said fight is a mystery.