Quote originally posted by Heart's Soul:
This is impossible to do without a Gameshark. Namely because you don't get Abra until later and if that line has to be your location, then you have to beat Brock first.
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It's possible to skip Brock via a glitch: http://bulbapedia.bulbagarden.net/wiki/List_of_glitches_in_Generation_I#Pewter_Gym_skip