Earlier on this thread, I said I would research further into a whether the pokemon coloseum bonus disk can give shiny jirachis. Well, I bought PBR and loaded the shiny wshmkr I received in trade onto a custom card and tried to use it in wi-fi battle. It failed to go on wi-fi, which means that shiny wishmkr was definitely fake. For now, based on what more experienced gamers have said and on this personal experience, I am going to assume all shiny wshmkrs are fake.
I tested another pokemon: I tried a lv 1 giratina (faraway place) and it passed the test and I wi-fi battled it. This and the other lv 1s I got from the gts concerned me because they arrived with their special move from HGSS missing.
I read elsewhere while researching this that these moves are stripped out when these pokes are traded onthe gts. Can anyone with HGSS experience confirm this?