After comparing a Japanese Wonder Card after the Release of Japanese Platinum (took Pokemon Center Eevee). I finally managed to get it to work, 0000014C~D must be 801D (after the FFFFs). And here I thought that address was only for In-Game Distribution.
It's a shame Platinum Pokesav's modification of the Wonder Card didn't work when I tried it. A bit mad at myself for not thinking of comparing a post-Platinum Wonder Card sooner. I did get the Secret Key from Wi-Fi Connection and compared the WC, that value didn't seem to work for that address through Hex Editing.
Just happy I got it working so I don't have to use Pokesav with a more legit method. No problems with the Patcher.