Goldenrod City

Goldenrod City is located in Johto.

It houses the Goldenrod City Gym, led by the Normal-type specialist Whitney.

After you beat Whitney, outside the Goldenrod Gym go slightly to the right, there is a girl there that will give you a key item squitle bottle, you'll need it to get rid of the suwoondo like plant in route 36. The plant is gone once you obtain the squitle bottle in your inventory.