The sixth gym leader,Sabrina, is in Saffron City.
In dragons den
Sabrina, a phsycic type leader
Sabrina
The 14th gym leader is the 14th gym you challenge, and there really isn't an order. However, in chronological order, the 14th gym is the gym in Saffron City, with Sabrina as the gym leader.
Sabrina, the psychic gym leader. She is located in Saffron City just after beating Koga, the fifth gym leader.
In the Kanto region, the sixth gym is in Saffron City. The gym leader is Sabrina.
Sabrina in saffron city
To get the sixth badge you need to go to Saffron City and fight their leader. You must defeat the rockets in Silph first, however. Saffron's leader, Sabrina, can also be the fifth gym leader. Koga, the poisonous ninja of Fuschia, could be the sixth gym leader if you fight Sabrina first. Their position can be swapped. And please find the weakness of poisonous Pokemon before fighting them. They are super powerful
If you have gone in order so far the 14th gym leader should be Sabrina who is in the saffron city gym.
The 6th gym is in Saffron City the gym leader is Sabrina she uses Psychic type pokemon.
No Giovanni is but i will not tell you where he is