You're looking for BLAINE, he uses fire-type Pokemon. You'll find him on cinnabar island, south of Pallet Town:
Fly to Pallet Town, surf in the little pond bit at the bottom and you will see it is actually the sea - follow the sea route south until you reach Cinnabar Island..
But its locked.
The key is in Pokemon House, which also on the Island.
Inside the gym you will have to answer a series of questions to get through it - If you get it right, you can go through, if you get it wrong you must fight a trainer. I recommend fighting the trainers anyway for additional EXP.
Finally, reaching Blaine, take him down with your strongest water pokemon.
Hope this Helped :)
RAYNAL
In Pokemon Pearl version you fight the gym leader Norman. Pearl version is apparently not a legitimate version of the game and you will not be able to get into his gym due to a bug.
Hearthome City has the 5th Gym Leader. The 5th leader is Fantina and she uses Ghost-type Pokémon.
use a good fighting type Pokemon like machoke and use its moves
The fifth gym leader in Pokemon platinum is crasher wake but you get the fourth badge.
Yes, Viridian City gym is one of the last gyms to be completed in the game. I believe that Giovanni is the leader the first time, and Gary is in another game.
The 7th gym leader in Pokemon yellow is in Cinnebar Island, which is south of Pallet Town. You need a Pokemon with Surf to get there.
Brock is the first gym leader in pewter city.
go to the 3rd gym badge place battle the gym leader, beat him , talk to officer jenny for your squirtle.
Giovanni
You Cant
In Pokemon Pearl version you fight the gym leader Norman. Pearl version is apparently not a legitimate version of the game and you will not be able to get into his gym due to a bug.
i cant explain
celadon city
The 7th gym leader is Blaine. He the gym leader of Cinnabar Island gym. He uses Fire type Pokemon and he will give you the TM that contains Fire Blast when you defeat him.
dubic-red,miyomi-green,biggert-yellow & shiyiyami-blue in japenese version pokemon chrome
In the town where Ltg. Serge is a gym leader there is an officer there with a squirtle. Beat the gym leader and talk to her afterwards.
The 5th gym in Pokemon Yellow is the Fuchsia City gym. The gym leader is Koga who specializes in Poison/Bug type Pokemon. Once won you will recieve the Soul badge, TM06 - Toxic, & be able to use HM03 Surf out of battle.