Egg and evolve Pokemon
First, type in the code 01FDEDD0
Then, walk in the grass until you get in a battle, it will be an egg.
Capture it (if you want a master ball it is 0101B8D5)
When it hatches, all of you Pokemon that are required to trade to evolve will evolve anyway (ex. Haunter, Kadabra, Graveler etc.)
If you need more help, we've got more Pokemon Gold cheats and also check out all of the answers for this game
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