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Do you mean the 3rd Gym Leader you come across (lieutenant surge) or the first three (brock, misty, and lieutenant surge)? Anyway, I'll give you all three Brock is a rock/fighting Pokemon fanatic, so use psychic Pokemon against him. If you come to Saffron, that's the reason the fighting dojo isn't a gym anymore (Sabrina, a psychic Pokemon gym leader, battled the dojo and Sabrina won the gym leader status, leaving the dojo out of the dust, but I'm getting too off topic) Misty is a water Pokemon fanatic, so use electric Pokemon. Electricity has the same effect on water as a blow dryer cord does in the water. They both zap the water tremendously! I learned this on Route 12 by the fishing guru's house. Lieutenant Surge is an electric Pokemon fanatic, so use ground Pokemon. If you defeat Lieutenant Surge, he actually tells you that electric Pokemon are worthless against ground Pokemon. GO DEFEAT THEM! ubermensch00
If its the game im thinking of then Lieutenant Surge
TM24 is given by Lt Surge after his defeat at the Vermilion City gym.
Use a ground-type. Duhhhh!!!!!
Sperm.
The third gym leader is Lt. Surge, an electric Pokemon trainer. In the yellow version his only Pokemon is Raichu. Raichu can be easily defeated by a ground type Pokemon. Conveniently, Diglett's Cave is located right next to the town. In here you can find wild Diglett's and maybe wild Dugtrio's, the evolved form of Diglett. These Pokemon can easily defeat Lt. Surge with the Dig attack.
Thou go to cerulean city and go inside a cave
Officer Jenny is in Vermilion City. She gives you a Squirtle after you defeat Lt. Surge if you have the starter Pikachu in your team.
In G/S/C, the 9th gym is the first you battle when you reach Kanto's Vermillion City, the leader Lieutenant Surge.
Go to the gym in Vermillion City in Kanto and battle Lt. Surge, the Gym Leader. He'll give you the 9th Gym Badge after you defeat him.
To get past Lt. Surge, it is best that you have a ground type Pokemon or a Pokemon with ground type moves. It will be very difficult to defeat the electric gym without a ground type to be super effective against it. Just plain powerful Pokemon work just as well, but take time to defeat that gym.
LT. Surge has a level 28 Raichu and that's it.