This trick requires a Transfer Pak and Pokémon Gold or Silver. Make sure your Pokémon Gold or Silver game is saved at a Pokémon Center. Go to the Mystery Gift option. Use Mystery Gift. Go to GB Tower. Use the "Change time" trick and use your password to change the time in Pokémon Gold or Silver. Change the time one day forward. Go back to Mystery Gift on Pokémon Stadium 2 and use it. Repeat this until you get the items you want.