1st Gen Item Duplication Glitch Not Working?

I'm surfing on the shore of Cinnabar and I find M, both at level 0 and 80 but still isn't duplicating my Rare Candies? I've done this multiple times but it's now not working.

have you tried beating him? I am pretty sure when you encounter him the first time it duplicates, but you may have to beat him, as long as you don't catch him your game should be fine.

Edit: Try this it's my glitch thread,although wasn't popular so I stopped posting in it. https://www.pokecommunity.com/showthread.php?t=409870

A more sure fire way to duplicate is to use the Ditto glitch wherein you have Ditto transform into a Pokemon with a Special Stat of 182-184. These values are stable and correspond to Helix Fossil, Dome Fossil and Ghost. Defeating them in a wild encounter is not necessary since by engaging them in a wild encounter multiplies the item in the 6th slot(in this case Rare Candies). If you want to know the Ditto glitch, see this video:



Note: Wild Ditto in Yellow are only found on Cinnabar Island.