Saffron City Gym

Saffron City Gym is home to Sabrina and her Psychic type Pokemon.
The gym is full of teleporters and can be very tricky at first, but here is a map that will help you get through it quickly and painlessly.
 
At the entrance go to the top right teleporter [1].  Then make your way to the top left teleporter [3].  From here, take the bottom left teleporter [8] and then straight down to the bottom left teleporter again [15].
Go to the only other teleporter in this room and now you’re at Sabrina!  Good luck.