Board Thread:Versus Debates/@comment-5085906-20170423110447/@comment-25122992-20170423133614

Yeah, as Kakashisologod1 noted, while there's no doubt that Pain was summoning the animals all by himself, with all respect, it was Shima who summoned Gamabunta and Ko into Konoha, saving Naruto from the need to use his own chakra for the summon. And I guess that the summoning of such massive toads as Bunta/Ken/Hiro (if we're counting only these three without Fukasaku/Shima/Gamakici) would've taken quite a toll on Naruto's reserves.