You Have to beat Sliph Co. Towers Boss In Saffron City first then to the Verdian Gym, the Team Rocket Boss is the Veridian Gym leader
Veridian city
Veridian Forest is in Kanto between Viridian City and Pewter City
in Pokemon heartgold, soulsilver, firered, and leafgreen it is north of Viridian city
after Cinnabar Island you will surf going to Pallet Town or you can use fly to Pallet town or straight to Viridian City. the gym will open after defeating Blaine and after you get the master ball. upon reaching the gym leader, you will see that the leader is Giovanni, the leader of Team Rocket.
The Viridan Forest is a little ways south of Goldenrod City.
To get the last gym badge you have to go to cinnabar island and you will meet blue. he will tell you that he will be waiting in veridian city to battle you. when you go to veridian city you go to the gym and fight him at the end of the gym.
North of Veridian City and south of Pewter City.
In veridian city
Its right above viridian city.
Veridian city
You cannot get to Cinnabar Island from Fuchsia City. You have to surf south of Pallet Town to get to Cinnabar Island. Just remember, Blaine is not on Cinnabar Island.
After defeating Blaine of the Cinnabar Island Gym Leader, fly back to Cinnabar Island and Blue should be there. He will explain to you about his Champion life and Red, and he will say that he will meet you at the Viridean City Gym. Fly to Viridean Gym and battle him.
Veridian Forest is in Kanto between Viridian City and Pewter City
Its on cinnabar island, you will need to use surf to get there from fuchsia city ^.^
in Pokemon heartgold, soulsilver, firered, and leafgreen it is north of Viridian city
after defeating koga go find surf in safari zone and surf down in the water near the gym and go to cinnabar island the islands gym is a fire gym
after Cinnabar Island you will surf going to Pallet Town or you can use fly to Pallet town or straight to Viridian City. the gym will open after defeating Blaine and after you get the master ball. upon reaching the gym leader, you will see that the leader is Giovanni, the leader of Team Rocket.