Once you reach to Fuchsia city gym. You will see lots of ningas. Only one of them is the gym leader, and the others are fake. To find out, talk to them. If it is the gym leader, it will stay in the ninga suit. If not, it will show its real person and battle you. Tip: The gym leader is the most EASY gym leader in the map. She carries 5 Pokemon and Each are levels 28 to 30. Easy? Fly will do the best because her Pokemon can kill them self and try to hit you. If you are in the air, it has no effect and the Pokemon FAINTS.