You have to go to Celadon City, in the building on the left of the pokemon centre is an old woman who gives you tea, receive the tea, then walk through the entrance to saffron and the guard will share the tea with all the other guards so you can go in through any entrance.
You must get the hot tea from an old women in Celadon City. Next, go to the pathway where the men who are thirsty are. Give them the drink, and they will let you through to Saffron City.
if you meen in Cerulian city you need nationalpokedex, to get that yo need to take the Pokemon league and get 60 Pokemon
You cant only through hacking.
Go through the rocky tunnel
nope
Well in Firered there was an old lady in a mansion in Celadon City and she gives you tea to give to the thirsty guards.
Go to Celadon City and enter the Celadon Mansion. Talk to the old lady on the 1st floor and she'll give you Tea. Then go to any of the thirsty guards, give him the Tea and he and the other guards will let you pass! To get to Celadon City, go get Flash and go through Rock Tunnel to Lavender Town, then go to the Underground Passage next to Saffron.
Assuming that you're playing FireRed or LeafGreen, you actually have to give them tea, which you get from an old lady at the Cerulean City apartment building.
1. Go to Celadon City 2. Enter the hotel 3. Talk to the old lady on the first floor 4. She will give you tea, and then you give it to one of the guards 5. He/she will say I'll go share this with the other guards, and you can now go into Saffron City any time you want.
Give the guards a drink. No, seriously. You use the underground passages to get to Celadon then go to the roof of the department store and buy a drink off the vending machine. Doesn't matter which one. Then you give it to any of the thirsty guards and they'll share it with their fellows and then you should be able to get through all of the closed roads.
Lemonade can be bought at a vending machine in the department store.
You must get the hot tea from an old women in Celadon City. Next, go to the pathway where the men who are thirsty are. Give them the drink, and they will let you through to Saffron City.
You have to defeat Koga or the Ghost tower, I think.
It is not water it is tea and you get it by going to celadon city and getting it from a old lady
You can not give anything to the policeman who says he's thirsty to drink on Route 218. This is a reference to guards who said the same thing in Pokémon Red and Blue.
In the Celadon Mansion in Celadon City, an old woman offers you some tea. Take the tea and give it to any one of the four guards blocking your way to Saffron City and they will let you through.
get to vermilion, and get on the S.S anne (get a ticket by talking to bill, route 25) learn cut off the captain then go to cerulean go to the right for a bit, then through rock tunnel to lavender town go left under saffron and then in celadon there are 2 ways to get passed the thirsty guards. 1.go to the top floor of the supermarket place and buy a drink from the vending machines 2.go in the tall building (to the right of the supermarket) talk to the old woman on the bottom floor she will give you some tea talk to the guards now and they will let you through