The first in-game trade is a relatively simple one. In a house in Violet City, you will find this guy who would like to trade their Onix for one of your Bellsprout

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Rocky / ブルブル OT: Rudy / コンタ ID: 48926	Persim Berry
Bellsprout	Onix

Up on the fourth floor of the Goldenrod City Department Store, you will find this gentleman whom is looking for a Drowzee. In exchange for it, he will give you a Machop

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Muscle / きんにく OT: Jose / ナオキ ID: 37460	Macho Brace
Drowzee	Machop

In one of the houses of Olivine City, you will discover a fisherman whom is searching for a Krabby. He will offer you a Voltorb he recently caught

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Billy / ビリー OT: Richard / ジン ID: 29189	Cheri Berry
Krabby	Voltorb

In the eastmost house of Blackthorn City, you will find this woman who is searching for a female Dragonair. She will offer you a Dodrio in return

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Doris / ドンドコ OT: Ayana / ミサコ ID: 00283	Smoke Ball
Dragonair	Dodrio

In the Pokémon Centre of Pewter City, you will discover this man who is searching for a Haunter. In return, he will offer you a Xatu

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Paul / チーフ OT: Mondo / モンド ID: 15616	Wacan Berry
Haunter	Xatu

In the Power Plant in Route 10, you will discover this scientist who is looking for a Dugtrio. He will give you a Magneton in return

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Maggie / さてつ OT: Lorenzo / モリオ ID: 50082	Metal Coat
Dugtrio	Magneton

After you have defeated Lt. Surge for a second time, you will discover he is in the Saffron City Magnet Train station. He is looking for a Pikachu from Viridian Forest and will offer you his French (or English in the Japanese version) Pikachu in return

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Volty / VOLTY OT: Surge / マチス ID: 33038	Yellow Shard
Pikachu	Pikachu

After you have received the Hoenn Starter from Steven and spoken to him in the Pewter Museum, Steven will be in the lobby of Silph Co. and would like to give you a Beldum. In exchange, he would like a Forretress. The Beldum also has a Dawn Stone attached

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Iron / こうてつ OT: Steven / ダイゴ ID: 23478	Dawn Stone
Forretress	Beldum

After you have defeated Brock, on Saturdays between 17:00 and 20:00, you will find Brock in the entrance of Diglett's Cave. When you talk to him, he will talk about Sudowoodo. After a while, he will talk about it's pre evolution Bonsly. He will ask you for one and in exchange he will give you his Rhyhorn, which knows Thunder Fang

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Hornlette / つのこ OT: Brock / タケシ ID: 06845	Passho Berry
Bonsly	Rhyhorn

After you have defeated Jasmine in the rematch, she will be in her gym most of the time, except between 13:00 and 14:00. Here, you can go to her and she will suggest a trade. She is offering a Steelix to you. However, in exchange, she will accept any Pokémon.

Your Pokémon	Their Pokémon	Details	Hold Item
		Nickname: Rusty / ネール OT: Jasmine / ミカン ID: 26491	Soothe Bell
Any	Steelix