Just throwing this out there, but would it be possible to do something like
206E23C0 00006E00
42000000 90000000
02E2EB22 0000AEB0
E0000000 80008000
to get it in your first slot? Or any other abnormal code not listed on Aibo? Through Gecko or Ocarina, I mean.
EDIT: Nevermind, I tried it already. It made my game freeze 6/6 times. I just ended up getting one from gamefaqs. I guess 50,000 bells is hard to pass up!