From Bulbapedia, the community-driven Pokémon encyclopedia.
This is a reverse-chronological list of event Pokémon distributions that were given away via trading to Pokémon games in Generation IV. In Generation IV, Korean games cannot trade with non-Korean games, so Korean games could not receive these events. This page only includes trade events that were done on a local scale, and does not include the events that were distributed over the Global Trade Station.
List of event Pokémon
Red and Green Anniversary Pichu
This Pichu was distributed at Pokémon Center stores in Japan on February 27, 2008 to celebrate the 12th anniversary of Pokémon Red and Green. The egg has an OT and ID number stored. The OT is ＴＯＫＹＯ and the ID number is 55957. When an Egg is generated, it is given the OT, ID, secret ID, and game identifier of the game which created it. This can cause an Egg which is traded to hatch Shiny and then be normally colored, or hatch normally colored, and then be Shiny. This is due to the change in OT, ID, and secret ID happening after the hatching cutscene.
Kyocera Dome Pokémon
These Pokémon were distributed at the Kyocera Dome in Japan at the Pokémon Daisuki Club party on February 21, 2008.