you need hm 1 cut
the 16th gym leader is:Trainer Blue
Blue, the last gym leader in kanto region
The 5th gym is the Fuchia city gym Gym leader Koga
gem leader blue
Giovanni, he has rock type Pokemon
Machamp, Arcanine, Exeggutor, Rhyperior, Tyranintar, Pidgeot. I made a link of all gym leaders, blue the gym leader is at the bottom.
It could be Blue or Clair.
To get the 8th Gym Leader to return to his Gym in Viridian City, you must defeat all 7 other Gym Leaders.
do you mean blue? because red's not a gym leader. but red is on top of mount silver
Blue is the guy you go to if you want to find the viridean gym leader
Red is in mt.silver and blue is the eight kanto gym leader
Cinnabar Island.