Pokemon Black Version 2

This medal says I have to fill up the Pal Pad. Do I have to contact the people registered in the Pal Pad like with the other Pal Pad medals, or can I simply just put in random FCs and get the medal that way?
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The new Universal Wars demo is available now!
http://www.slimesalad.com/forum/viewgame.php?t=5169

You need to interact with people
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3DS FC Ares 3738 0446 1787 <> Black 2 FC Enyalio 0562 4621 2772
DW Collection: http://tinyurl.com/3qz7odk