Glitch City Wiki:List of unconfirmed glitches
The Celebi Celebration glitch was a glitch reported in Pokémon Gold and Silver. During the Pokémon Fun Fest event in Six Flags over Georgia from August 4th to September 9th 2001[citation needed], there was an event to obtain Celebi called the Celebi Celebration.
From one player account, a freeze would occur during the distribution if a Pokémon in the party was holding mail. A Nintendo official told the player that he was looking for an item, and asked the player to remove a Spearow named Kenya (likely the Spearow belonging to the NPC Randy)'s mail.
The validity of the glitch is questionable, because the event and distribution is long over.