Things You'll Need
Instructions
Catch a Scyther during the "Bug Catching Contest" mini-game.
Acquire the "Metal Coat" item by catching wild Magnemites. Eight percent of wild Magnemites carry the item, so you may need to catch many to find a Metal Coat. You can also acquire a Metal Coat by going to the Power Plant and finding an NPC who will trade a Magneton for one of your Dugtrios. This Magneton will always carry a Metal Coat.
Equip your Scyther with the Metal Coat.
Link your "Gameboy" with the second "Gameboy."
Trade your Scyther, equipped with the Metal Coat, to the second Gameboy for any Pokémon. The Scyther will evolve into a Scizor as soon as it transfers to the second Gameboy.
Trade the newly-evolved Scizor back to your original game.