Firmware
This is the Retroid Pocket 2 Firmware & Reflash Guide for Android 6 (not RetroidOS/closed system).
Here is the direct link to Android 6 image without instructions: https://mega.nz/folder/FQsRGbYD#rMLsoUxaZEIFnt0l6EseJA
This is the stock SD Card image for use with the Retroid OS/closed system (no games included). Thank you to @/silverdusk/ and Taki for providing.
If you are having any issues with connecting your device to your pc or if you are trying to reflash the device, make sure to install the Android SDK suite. It will include the driver's for USB support. If you have previous drivers please make sure to uninstall them as well. https://developer.android.com/studio#downloads
Download the official Android IDE and developer tools to build apps for Android phones, tablets, wearables, TVs, and more.
If you do not want the whole suite, you can just install the USB drivers. Make sure to read the instructions on the site. https://developer.android.com/studio/run/win-usb
Guide for rooting your device: Download and Root at your own risk. The guide is installation.txt.
Credit to @Jecklen, @dsachs420, @TotallyTerry, @/silverdusk/, @uncletrunks and @Taki