A:AnswerHave you charged the controller with the USB cable it came with? I would try that first. If the issue persist id bring it back to best buy with your receipt, if it's past return policy check with the manufacture.
A:AnswerThe dongle should work, as long as the software your using has the functionality to use a controller. It will need to be configured to the software. It also world when plugged in via USB
A:AnswerYes, the SN30/SF30 2.4ghz are different than the SN30/SF30 and SN30pro. The SN30/SF30 and SN30pro use bluetooth, the SN30pro does not support 2.4ghz so this will work no problem and is 100% supported and working with the SNES Classic so long as you have the 8bitdo reciever.