Seafoam island
east of cinnabar or southwest of fushia
in one of the caves
This is because the volcano eruption at cinnabar destroyed the gym and the leader, Blaine moved the gym to seafoam island
a city
the seventh gym leader is in the island where articuno was in and still is
he is at the sea form islands
It is in Mahogany town in the southwestern corner of the town.
The last Kanto gym is in Varidian City.
mahogany town it is an ice gym or if you mean in kanto it seafoam island and it blanie fire type gym
He is in the seafoam islands.
Blue is the 8th kanto gym leder.
beat the all the gym leaders
Blue, the last gym leader in kanto region
Beat the 8th gym in Kanto
you got to beat all the Pokemon gym leaders in kanto other then blue,then talk to him