A:AnswerI use a dongle with:
2 type C connecters (one for power)
2 usb A
1 HDMI
I imagine a dock will work too. You can download apps and use a Bluetooth controller. Sorry for not showing a controller with it. Hope the photos help.
A:AnswerThe packaged wall adaptor is just power, they make a ROG Ally Power adaptor that has a USB port and a HDMI port, but you have to purchase it separately.
A:AnswerYes, you can connect the XG mobile and still just play on the Ally screen itself, or use the Ally controls and use an external monitor. Downside to this use case is how short the XG mobile connector is. Not a lot of space to move once connected.