Board Thread:Episode Discussions/@comment-25787298-20160519120227/@comment-26977715-20160520154539

If you always try to find reasons why something would not work, you will never be pleased with the story... For example:

Even if Gamamaru was trapped inside IT, he still had the orb that recorded what happens on the surface and nothing could have stopped him from going at the tree location and learning it's true nature (after Kaguya erased his memory. Did she even believed that animals with "memory" like Gamamaru existed on that planet?). In conclusion, we don't care whether he got trapped in IT or not.

I think that it is safe to believe that there are more special animals on that planet, since all bijuu are animals or probably Hagoromo made them special by giving them the chakra. The birth of the bijuu is an episode that I really want to see.