There is no blocked gate, just a thirsty guard who won't let you past them and get into Saffron city unless you get them a drink from the Celadon Dept. store from the vending machine. All four guards won't let you past, by the way but the good news is that you only need to buy one drink because they all share the same drink.
I believe the forth gym in Blue is Erika of Celadon City. All you need is HM Cut, which you get in Vermillion City. You may also have to defeat Team Rocket in the Celadon City's Silph Co., but I'm not sure.
Celadon City
its in celadon city
Both Goldenrod City and Celadon City have Supermarkets.
celadon city
Go to Celadon City and buy a drink for the guard and he will let you through
Top of the big building in Celadon City
Pokemon mansion, celadon city. The old lady gives you tea.
You can't go to Celadon city in Pokemon Pearl. Its from an earlier region.
Gary does not appear in Celadon City.
I believe the forth gym in Blue is Erika of Celadon City. All you need is HM Cut, which you get in Vermillion City. You may also have to defeat Team Rocket in the Celadon City's Silph Co., but I'm not sure.
In the bottom floor of the Celadon Mansion.
The guard is only guarding to saffron city. Do you go into houses? The way you get to celadon city is to go to the house on top. Follow the road until you reach the stairs. Go out the door and you should be in celadon
Obviously it's in Celadon City.
Celadon city
Celadon City
sadly no you cant get into the underground tunnel from celadon to lavender but you can take the one from cerulean city to vermillion city though.