You get one on the boat. When you complete the Elite Four (you need to beat all 8 badges, then swim to the right in New Bark Town and so on... Then pwn Elite Four and the Champion. They have pretty tough Pokèmon), you get a call from Elm, and he gives you a ticket. Go to Olivine, and go to the port. A sailor will ask you for the ticket, and you'll end up on the boat after all. You complete a little quest there (this is another story; albeit it involves finding a girl and stuff), and a guy gives you a Metal Coat as a thanks. The boat will then arrive to Kanto.
To get scizor in Pokemon gold you must trade a Scyther that is holding Metal Coat. Metal Coat can be attained on the S.S. Aqua after you defeat the Elite Four.
You need to trade an Onix holding a Metal Coat.
you trade your onix with it holding a metal coat
onix has to be traded and be holding metal coat
the Pokemon that evolve with metal coat are steelix and scisor
In the SS Aqua
To get scizor in Pokemon gold you must trade a Scyther that is holding Metal Coat. Metal Coat can be attained on the S.S. Aqua after you defeat the Elite Four.
Trade onix holding a metal coat
You need to trade an Onix holding a Metal Coat.
you trade your onix with it holding a metal coat
onix has to be traded and be holding metal coat
the Pokemon that evolve with metal coat are steelix and scisor
scyther evolves using a metal coat on whatever level he is on.
The Metal Coat can be found on Iron Island.
You dont, you make the pokemon hold it
Scyther evolves by trading it while it is holding a Metal Coat(item)
It doesn't evole at a level, it evolves into Steelix when traded holding a Metal Coat.