Simply beat the gym leader in every gym.
16 badges. 8 from Jhoto and 8 from Kanto.
Go to Cerulean Cave after you have 16 badges.
After collecting 16 badges, Moltres is in Mt. Silver
You need all 16 Gym Badges
Seafoam Islands but you have to have all 16 gym badges You have go to the cave before blaine's gym an you don't have to have all 16 badges because i did it 14 badges.
HM08 Rock Climb (receive from Prof. Oak after obtaining 16 badges).
You get 12 badges
after professor oakgives you another starter when you get all 16 badges
you need to get all 16 badges, then speak to prof. Oak- i think
battle red on top of mt silver
You need Hm Rock Climb, you need to obtain all 16 gym badges.
Only place I found him is the path leading to Mt. Silver (must have all 16 badges to get there)