Thanks to Dragonite and Serebii, we now have a massively complete list of every single event that has been made for the third, fourth and fifth generation events.

The Database.

and a supplementary; List.

Simply click the category you want and you'll be able to see the info for any Pokemon in that category.

While this does give the complete info on every event, please remember that some events shown on this list, including any Gen IV Korean Pokemon, Hall of Origin Arceus, and any other events where AR was used (even if it was just to activate the event) are not allowed to be traded on this site.