Blue is the viridian gym leader and red is on top of mt silver once you beat all the kanto gyms
Viridian City, Giovanni(Team Rocket Leader) is the Gym leader.
To get the 8th Gym Leader to return to his Gym in Viridian City, you must defeat all 7 other Gym Leaders.
Go to Viridian city and beat Giovanni,the gym leader
It is in Viridian City. After you have beten the 7th gym leader it is open
Blue
He is on Cinnabarr Island.
The last gym is in viridian city
in viridian city
He is the gym leader Viridian city
Viridian city
on cinnibar island beat the 7th gym 1st tho
Defeat the viridian city gym leader Blue.
beat the other 7 gyms in kanto and talk to the 8th gym leader on cinnabar island. he will leave and go back to the gym
to face the viridian gym leader Blue (Gary) you have to get the first 7 of the gym badges from the kanto region and speak to him on cinnibar island, he will return to the gym an await your challange. his Pokemon are quite strong so train hard :)
Blackthorn if you are including Kanto its Viridian Pokegamer01
Blue is the Viridian City Gym Leader (Badge #16)