Board Thread:Theories and Speculation/@comment-2165692-20170426120148/@comment-734582-20170426142339

BerserkerPhantom wrote: It was. By Jiraiya. Jiraiya's explanation tells us nothing about how the hell Kakashi came across ninja dogs (which we see nowhere else, and Kiba has a regular dog), how Sasuke came across his hawk, or how Danzo summoned some weird elephant hybrid that was apparently also a real animal.

Jiraiya's explanation only covers the most basic aspect of summoning.

BerserkerPhantom wrote: We don't see him to a contract, and he was attempting to summon a small toad, not a snake. Boruto mentions in the closet that he sees scrolls and is intending to use a summon. He could've screwed up the contract part.

BerserkerPhantom wrote: Which creates the argument of "Oh, Boruto didn't actually summon this". Except it fairly clearly originates from Boruto's summon circle. BerserkerPhantom wrote: And the argument is reinforced by Konahamaru saying that there's no way Boruto could summon a creature of such size with his chakra. Even more so, when you consider that Naruto could only Summon Gamabunta, a creature about the size of that snake, with Kurama's chakra, and even then after a month's worth of training. Gamabunta is considerably bigger than that chimera. Especially since the tail/snake makes it look considerably bigger. There was also a purple glow which isn't natural for a Summon either, and it appears to me like some sort of seal was broken. So i think Boruto simply created an access point to some space-time prison or whatever that he shouldn't have, and the beast unleashed itself.