Just uncheck the box that has "you have recieved this gift" in a mystery gift editor. You still should be able to get the events even though it says "You have already received this gift before" since it worked for me.
Nature
Date
region you caught it in(ex. Hoenn)
Arrived at Lv.(level it appeared when you pal parked it)
Description (ex. Alert to sounds)
other than the region everything is basically the same as a pokemon caught in the game.
I have more proof on a ruby and sapphire remake. While looking at the 5th gen wonder card map i noticed that on offset 0x04 says "ruby(sapphire)" on the middle option so that got me thinking that this is a hint to a R/S remake.
http://projectpokemon.org/wiki/5th_Generation_Wonder_Card_Map
Yes it is possible to SR for shiny's
I'm surprised and not surprised that the God pokemon won, but hopefully someone is able to get the Arceus and thank you d4rk_13l1t2er for finding the code.