I think it was for the REALLY old events...I'm pretty sure the DS ones can never be shiny, unless they're supposed to.
Also, TWO WEEKS?? HOLY SHIT. That is a LONG TIME. And yes, I think that pretty much covers it - I've never played Emerald so I don't know what's available legendary-wise, but if you can't get Mewtwo or the birds that covers it, I reckon :)
Also, TWO WEEKS?? HOLY SHIT. That is a LONG TIME. And yes, I think that pretty much covers it - I've never played Emerald so I don't know what's available legendary-wise, but if you can't get Mewtwo or the birds that covers it, I reckon :)