Although I agree with the beta theory being most likely, hacking Gen FOUR games won't tell us if it has any importance in Gen FIVE. That's the argument being put forth. Hacking the special Jirachi and Pikachu Colored Pichus did not reveal that they were meant for a Pokewalker course and an event in the next game, that was handled when they were transferred over. The argument is that, if the item is placed into a player's inventory by an event and then traded to the other Gen attached to a Pokemon, that in B&W it will check the player's inventory for containing "Lock Capsule" and then only activate an event based on that.
Also, in Crystal it was not a beta item. The Teru Sama was a placeholder item that was put in or after the GS Ball ball was removed from the Japanese version. In Japan, the GS Ball could be added to the inventory through a cell-phone-connected online event, which triggered a Celebi event in game after being given.
