Click the "Open in Customizer" button to the right of the picture above! Allows you to create your own Yokai Medals for the English version of the toy. Use the customizer to define which notches are present (1) and which aren't (0). The array is 4x4, where the first entry is the left-most notch on the top row and the last entry is the right-most notch on the bottom row.
I don't have a list of which Yokai are for which 'code', so you'll have to figure that out for yourself!