The code has apparently been made, but for the Japanese version of black/white.
Wifi Record Modifiers(Select)
Single Battles
94000130 FFFB0000
1223E568 0000xxxx
1223E56A 0000yyyy
D2000000 00000000
xxxx being wins, and yyyy being losses.
Can someone please make this for the U/E versions? It obviously can be done.