Somehow, the iPad Pro does not implement the new Apple 3D Touch technology, while the latest the iPhone 6s and iPhone 6s Plus are fully functional with this feature. Now thanks to a developer named Hamza Sood with the Apple Pencil through jailbreak, was able to have the 3D Touch work on the iPad Pro, but with an important nuance. And the hack is useless if you do not have an essential element in this case: The Apple Pencil.
And that in fact is the pressure in iOS 9 that activates Apple Pencil to deploy 3D Touch functions so that the operating system converts the pressure data in stylus pressure data in 3D Touch interactions.
— Hamza Sood (@hamzasood) November 23, 2015
There is no other way, since the 3D Touch feature requires hardware parts that are only found in the iPhone 6s and iPhone 6s Plus; however, some of this hardware is adapted from the Apple Pencil, and that is none other than the calculating pressure on the screen to paint a more or less thick line. Hopefully we will be able to see the 3D Touch technology in the iPad Pro second generation. (Source @hamzasood [Twitter])