Blue
he is on cinnibar island
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 :)
Blue is the Viridian City Gym Leader (Badge #16)
Blackthorn if you are including Kanto its Viridian Pokegamer01