Where is the 4 th gym leader in Pokemon FireRed?

Im not sure but I think its Sabrina, she trains phsycic Pokemon and she is located in Safron city. Ill have to check my game, and if Im wrong Ill send another answer.

Im not sure but I think its Sabrina, she trains phsycic Pokemon and she is located in Safron city. Ill have to check my game, and if Im wrong Ill send another answer.