To unlock 3 each of the stat enhancing Matryoshka, you just have to upload your demo play through. There is an option to do so on the main menu screen.

Matryoshka	How to unlock
3x AT Matryoshka	Upload demo save data.
3x DE Matryoshka	Upload demo save data.
3x LC Matryoshka	Upload demo save data.
3x MA Matryoshka	Upload demo save data.
3x MD Matryoshka	Upload demo save data.
3x SP Matryoshka	Upload demo save data.
3x TC Matryoshka	Upload demo save data.