Board Thread:Naruto Discussions/@comment-25294339-20141101162145/@comment-26402727-20141102013149

GreatestSin wrote: but it would make more sense, nagato was crippled and such which limited his reserves, furthermore he used six dead bodys which created another unhealthy aspect to his health :/ but obito was enhanced because a hugh amount of hhis body consisted out of hahsis dna, which gavd him a immense amount of chakra...

i think this is the most logical reason why nagato couldnt revive his friend while obito revived madara who was dad for a much longer time :) ^_^

its more symbolic than other things, Nagato didnt revived Yahiko becausa Yahiko's dream was become a god and rule, so Nagato in order to make Yahiko "god" he used it as representation of Pain, Akatsuki leader and Rinnegan wielder.