i just got my shiny pichu checked on the hack-checking thread and it's legit. i appologise, i didnt even know it could have been hacked. i dont really remember for sure if i actually got it off the gts cause i got it so long ago... i originally wasnt going to trade it thats why i never posted up offers for it before.
I am so sorry, i didnt know but yes, that shiny pichu is hacked. I am not the original owner i am going to release it today.