the last gym leader is Blue.When you go to the seventh gym leader Blaine you should see Blue and asks you if you have 7 badges then you beat Blaine and go to Blue and he says to meet him at his gym
Blue, the last gym leader in kanto region
In the first city
blue in viridian city
you can take on any gym leader in kanto in any order (excluding blue you have to battle him last)
The Kanto gym leaders come in no particular order, but Blaine is typically the last gym leader fought, and also the second to last gym leader appearing on the Trainer Card.
nothing
you must frist go to seafoam island where blaine is, he is the 15th gym leader, then go to cinnibar island and a character who is behind the Pokemon center will then say that he is the last gym leader, once you have talked to him he will go to viridian city gym, he is the last gym leader. this is for heartgold and soulsilver :) hope this helped.
The last Kanto gym is in Varidian City.
The final gym is the Viridian City Gym. Blue is the Gym leader.
Viridian gym i forgot his name the team rocket boss guy.
Not enough info: which gym leader?
blue is the last gym leader in kanto after you beat the elite 4 you can go to kanto by taking the ss aqua in olivine city and go to kanto, battle the gym leaders, and capture legendaries