at lt. surges city is go to the Pokemon fan club and talk to the fat guy in the middle of the room
find 2keys in the trash cans, that will open the door
after beating lt. surge, you ll get it with thunderbadge
a easier way of leveling up is below! Pokemon level 1-30 find a level 50 Pokemon Pokemon level 31-100 find a level 100 Pokemon Pokemon level 101-200 fight a level 200 Pokemon Pokemon level 201-300 fight a level 300 Pokemon and so on... WARNING YOU MUST DO THIS ON VERY EASY!!
Train your pokemon.
its probably going to be a pikachu, voltorb, and a raichu at levels 24 or higher. for sure raichu might be lvl 27
at lt. surges city is go to the Pokemon fan club and talk to the fat guy in the middle of the room
After beating Lt. Surge at Vermillion City and acquiring the Thunder Badge, make you way to Celadon City to win your Rainbow Badge from Erika.
level 50
Find the two switches in the trash cans in the gym. To do this, go to a trash can and press the A button.
In Pokémon Red, Lt. Surge has three Pokémon and they are Voltorb, Pikachu and Raichu, his Voltorb is at Level 21, his Pikachu is his lowest level Pokémon and it is at Level 18 and his Raichu is his highest level Pokémon and it is at Level 24.
find 2keys in the trash cans, that will open the door
Find him at the power plant, show him a Pikachu and then he'll give you his phone number.
Lt. Surge has the following Pokemon: a lv. 21 Voltorb, a lv. 18 Pikachu, and a lv. 24 Raichu. Ground type Pokemon are the most effective against Electric type. East of the gym is is Digglett's Cave, you can catch a fairly high enough level Digglett to take down all of Surges Pokemon. If you're lucky you can a get a Dugtrio. I did this and sweeped his whole team without getting hit.
For LeafGreen and FireRed, Lt. Surge is going to carry the following Pokemon: Voltorb at level 21, Pikachu at level 18, Raichu at level 24. My best recommendation is go with the opposite type that he's using and go with a ground type Pokemon such as Marowak, Dugtrio, and Rhydon. In the case that you can't use a ground type Pokemon, the only thing I can recommend you is some good old fashioned training.
after you have Lt. surges' s phone number he'll be in his gym call him Friday mornings then he will be waiting in the fighting dojo in saffron city ( every gym leader will be waiting in the dojo after you arrange a rematch)
He is in Vermilon city