Don't think anyone's seen it mention but I finally got KK to appear on my island so I "beat" the game and immediately after getting control of my character again I got notifications that I had completed the Bug and Fish critterpedia after having previously done the All Fish/Bug/Fossil cheats...
Have to say this thread has been really helpful in getting my save modified. However I'm wondering if anyone has found the address for increasing the amount of say, merit badges you have?