after defeating Red on top of Mt. Silver. Then go to PEWTER CITY IN KANTO. from the Pokemon Center turn right. then up. and right again. he is on the hill next to the Pokemon Market.
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on your way to mount silver there is a house that you go in and they give steel wing.
Steelix is a good Steel type Pokemon. It is also a Ground type, too.
On route 209
in the pokecave you have to find the rare pearl
She has steel Pokemon, her Pokemon are 2 magnemites lv 30 and a steelix lv 35 hope it helped.