Instructions
Head to the Hoenn Safari Zone or routes 13, 14 or 15.
Run around these zones until a wild Chansey appears. This is a very rare Pokemon, and it may be days before you encounter one.
Fight and capture the Chansey. Chansey is a Normal-Type Pokemon, making him weak to Fighting-type attacks.
Check your newly captured Chansey for a Lucky Egg. Capturing a Chansey that is holding a Lucky Egg is the only way to find one, and only a small percentage of Chanseys have the item in-hand.