On my very first playthrough of Pokemon on Blue version right about Christmas 1999, I did not know what Oak's Parcel did and could not get past Viridian City as a result.
3DS Friend Code
Fire with Magmar, Slugma, and Braixen. Please PM if you want to add me.
Crobat, Golem, Magnezone, Butterfree, Spheal, Luvdisc, Charizard, Xatu, Sableye,
Shinies obtained from GTS/Trades
Parasect, Glameow, Chansey, Deoxys, Lugia, Machamp, Linoone, Spiritomb,
Skuntank, Foongus, Aron