Today, I'll be showing you how to install and boot Ninjhax 2.0 on your Nintendo 3DS. As of 7/19/2015, version 9.9.0 is the latest firmware. Ninjhax 2.0 DOES work on that firmware. Finally, something for updated 3DS's. It supports 4.1 through 9.9. You can also use this tutorial to install Ninjhax 1.0 or 1.1b. It's the same concept but a different website and QR Code.
---What you'll need---
1) Cubic Ninja Cartridge, Cubic Ninja downloaded from eShop,...
[Video+Written] How To Install Ninjhax 2.0