Board Thread:Naruto Discussions/@comment-26866422-20160407171305/@comment-4912646-20160409104319

The end of Part 1 seemed to imply there was some special relation between the Mangekyō and the Nine-Tails, but Part 2 revealed that only a regular Sharingan is required, and that it can control all the tailed beasts (as well as other animals like Manda) in an identical manner. Unless awakening the Mangekyō somehow enhances the regular Sharingan's control, but that's getting into weird speculation territory.