>>37632662Duplicating items in Red/Blue can be done with the old man glitch. In Yellow, you'll have to exploit the Ditto glitch and call a Ghost, Kabutops fossil, or Aerodactyl fossil form MissingNo. specifically; the majority of other types of MissingNo. in Yellow will freeze the game.
In Gold/Silver/Crystal, you can duplicate items easily with the cloning glitch, by having the Pokemon you clone hold them.
