I did something I thought clever but was stupid after all.
I told myself I'll create a back up of my save file so that if I died I wouldn't need to ask for a rescue. I did died but nevertheless, I ask to be rescued online just for the heck of it. I didn't wait to be rescued and just recopied my .sav file with my backup.
It was all fine until I tried rescuing others or checkin the wfc rankings. I now always get an error which says there is an error the occured in the wi-fi server. please try again.
My guess is that the server got confused that I have a previous .sav file that shouldn't exist. Now I cant go online in this game while I can go online in any other game I tried.
Does anyone have a solution to this problem of mine? This bites. I tried making a new save file, recopying the game into my ds but its still the same. I still cant go online in this game only.