Sub Doublon()
Dim Zone As Range, Cel As Range, Lig As Integer
Set Zone = Feuil1.Range("B2:C" & Range("A65536").End(xlUp).Row)
For Each Cel In Zone
If (Application.CountIf(Zone, Cel) And Application.CountIf(Zone, Cel.Offset(, 1))) > 1 Then
Lig = Lig + 1
With Feuil2
.Cells(Lig + 1, 1) = Cel.Offset(0, -1)
.Cells(Lig + 1, 2) = Cel
.Cells(Lig + 1, 3) = Cel.Offset(0, 1)
.Cells(Lig + 1, 4) = Cel.Offset(0, 2)
.Cells(Lig + 1, 5) = Cel.Offset(0, 3)
End With
End If
Next Cel
End Sub