Gyms

A gym is a place where you can battle a gym leader to obtain a gym badge. Gym badge plays an important role as an access to places and codes.

Brock- Pewter City
Brock is the first Gym Leader you encounter on your journey. He is located in Pewter City and is a Rock-type specialist. He will give you the Boulder Badge when defeated. He also gives the TM Rock Tomb & an EXP Share. For a type advantage, you can choose a grass or water type starter at the beginning of the game.

Cerulean City
This city is located after you came out of Mt. Moon. Mt. Moon is located after Pewter City on Route 3. The gym leader is Misty, a Water-type gym leader. Just like Brock, you can choose a grass-type starter at the beginning for advantage.

Vermillion City
This city is located after Cerulean City. In here, you can change your pokemon’s name by talking to a guy wearing a light purple shirt in the PokeCenter. The gym leader is Lt.Surge and is an Electric-type gym leader. For advantage, find a ground type pokemon (for ex. Onix) lol

Fuchsia City
After Celadon City, you will need to go to Fuchsia City to get your 5th Gym Badge, the Soul Badge, which looks like a pink heart. To get this, you have to beat 5th gym leader Koga, who specializes in Poison types. However, this is the first gym that does not have a junior, which means you can immediately fight the gym leader. However, the gym has an invisible maze that you need to pass before fighting Koga.

Saffron City
In Saffron City, you will face gym leader Sabrina, who specializes in Psychic Types. Bring a strong Dark-type to sweep her team. Afterward, she gives you the Marsh Badge and TM Calm Mind. The Gym puzzle is a teleporting pad maze. Once you get to the top, there is a teleporter that transports you directly to the exit. There is also a fighting type gym beside the psychic gym, where u can get Hitmon Lee and Hitmon chan

Mount Cinnabar
On top of mount cinnabar, you will face blain, who is a master of fire types. Bring a water type like Gyarados to the gym to destroy him. You can also get a Pidgeotite from the scientist at the entrance of the gym.

Viridian city
BOOM surprise the gym leader is Giovanni. he has an absurdly strong team, so bring your best pokes. He has Garchomp, Swampert, Nidoking, Mewtwo, Gliscor, and Mismagius (However, don't bring pokemon over level 80 as if u do, he will copy your team.)