[spudje]

I figured out the mapping and USB info:

Wireless connector

Device Descriptor:
bcdUSB:             0x0200
bDeviceClass:         0x00
bDeviceSubClass:      0x00
bDeviceProtocol:      0x00
bMaxPacketSize0:      0x40 (64)
idVendor:           0x2DC8
idProduct:          0x3100
bcdDevice:          0x0001
iManufacturer:        0x01
0x0409: "8BitDo

Button mapping of wireless 8bitdo SN30 Pro = SF30 Pro (not SF30Pro+)

D-pad				POV Hat
Left analog stick		X & Y Axis
Left analog stick button (L3)	Button 14
Right analog stick		Z Axis & Z Rotation
Right analog stick button (R3)	Button 15
Select				Button 11
Start				Button 12
Blue X				Button 4
Green Y				Button 5
Red A				Button 1  
Yellow B			Button 2
Home				Button 3
L1				Button 7
L2				Button 9
R1				Button 8
R2				Button 10

Not mapped			Button 6, Button 13

Button mapping of wireless PS4 dual shock
D-pad				POV Hat
Left analog stick		X & Y Axis
Left analog stick button (L3)	Button 14
Right analog stick		Z Axis & Z Rotation
Right analog stick button (R3)	Button 15
Share				Button 11
Options				Button 12
Square				Button 4
Triangle			Button 5
Cross				Button 1  
Circle				Button 2
Playstation button		Button 3
L1				Button 7
L2				Button 9
R1				Button 8 
R2				Button 10

Not mapped			Button 6, Button 13

Preferred mapping (Rys MkII CD32 emulation mode):
I corrected my original info, my thinking was wrong. Of course you can't change the mapping between the wireless controller and the receiver. Only between the receiver and the CD32.

D-pad				POV Hat		--> CD32 D-Pad
Left analog stick		X & Y Axis	--> CD32 D-Pad (Is that possible map this to both D-Pad and left analog stick?)
Left analog stick button (L3)	Button 14	--> No CD32 mapping
Right analog stick		Z Axis & Z Rot	--> No CD32 mapping
Right analog stick button (R3)	Button 15	--> No CD32 mapping
Select				Button 11	--> Together with button 12 operation mode switch
Start				Button 12	--> Together with button 11 operation mode switch
Blue X				Button 4	--> CD32 blue button
Green Y				Button 5	--> CD32 green button
Red A				Button 1	--> CD32 red button  
Yellow B			Button 2	--> CD32 yellow button
Home				Button 3	--> No CD32 mapping (If this is mapped in joystick and pad mode, please also replace this with other button)
L1				Button 7	--> CD32 L button (<<)
L2				Button 9	--> Autofire 2
R1				Button 8	--> CD32 R button (>>)
R2				Button 10	--> Autofire 1

I'll send Spidi a pm as well, hoping he can bake this in a new firmware.