Pokémon Yellow Walkthrough
I got the walkthrough off of this site.
A. Pallet Town
You begin your journey here. Professor Oak will give you a Pikachu, which attacks when you first leave town. You're rival (Let's call him Gary.) will be given Eevee. Return here after retrieving Oak's package. Then pick up a town map from your rival after you drop off the package and get a pokedex.
Route 1
You'll meet two people along the way to Viridian. The first man will give you a potion. I assume the other man tells you that you can hop over the ledges on the way back.
B. Viridian City
You'll find the first Pokemart and Pokemon Center here. You have to return Oak's package before you'll be able to buy anything or trade at the Pokemon Center. A man here will show you how to catch Pokemon. A potion is hidden by a bush above this man. You'll also return here to fight the final gym leader. A boy will also give you the TM for Dream Eater, but you need Cut to get to him.
Route 2 and Viridian Forest
There is very little on the way to the Viridian Forest for now. However, after traveling through the Diglett Tunnel you'll be on the other side of the shrubs. But don't worry about it for now.
In Viridian Forest you'll face many Bug Catchers and one Lass. Pikachu can easily handle these, but keep in mind you should be training other Pokemon as well. I suggest training a Caterpie because it eventually evolves into a very useful Butterfree at level 10.
Route 22
It's a little out of the way, but if go to Route 22 you get the chance to fight Gary and gain experience for your Pokemon. It also gives you a chance to catch a Mankey and Spearow.
C. Pewter City
Pewter City remains the same as in the red/blue version. There are many people here to talk to, but no one has anything very important to say. In Pewter's gym you'll face a junior trainer who has a Sandshrew and Diglett. Brock will have Geodude L.10 and Onix L.12. Since you can't find a Water or Plant pokemon yet I would suggest using Butterfree (level 13 at least). He'll give you a badge and TM 34 (Bide). By the way, the Jigglypuff in the Pokemon Center now looks like a Jigglypuff.
You can also visit the museum if you wish, but I think it's a waste of $50. After you get Cut from the S.S. Anne come back to the museum and cut down the bush on the far right side. Then you'll be able to enter a new part of the museum and retrieve the Old Amber.
Route 3, Mt. Moon, and Route 4
Be prepared to fight on Route 3. There a total of 8 trainers though some can be avoided. Most are Bug Catchers, who will carry Caterpie, Metapods, Weedles, and Kakunas. Other trainers will carry pokemon like Spearow, Ekans, and Rattata. A girl at the very end has a level 14 Jigglypuff.
Before Mt. Moon there is a Pokemon Center so you can heal your pokemon before going further. There's also a man who will sellyou a Magikarp for $500, but I wouldn't take it unless you want to get Gyrados sooner. Inside Mt. Moon there are many trainers. Look for the following items: Potion, Escape Rope, 2 Moon Stones (one can't be seen), Hp Up, and TM 12. It's just like the red/blue version until the end of the cave where you'll face Jesse and James. They've got an Ekans, Koffing, and Meowth.
Route 4 is pretty much empty. The only thing to be found here is TM 04, which contains Whirlwind. Don't jump over the last ledge unless you're sure you don't need to go back to the first few cities for something.
D. Cerulean City
When you first enter Cerulean City there's very little you can do. If you think your pokemon are ready you could fight Misty. She has a L.18 Staryu and a L.21 Starmie. Before facing her you have to go through two other trainers. Misty'll give you another badge and TM 11 (Bubblebeam).
After visting Bill's cottage Officer Jenny will let you until the house that has been burglarized. In the back yard you'll fight another Team Rocket member who'll return the stolen TM. It contains Dig.
There is a house next to the Pokemon Center where you'll find Bulbasaur. The trainer will only give it to you if you've proved you're a good Pokemon trainer. (Pikachu must be at level 20 or higher and happy enough to hop twice.) There is also a Bike Shop, but you need to get the voucher from Vermillion first.
Route 24 and Route 25
Before traveling on Route 24 you face Gary. He's got his Eevee, as well as, a Spearow and Sandshrew. After battling him you fight the 5 trainers of Nugget Bridge and a member of Team Rocket. For all this work you receive a Nugget (worth $5000 if you sell it). On a raised peace of land to the right, a man will give you Charmander (level 10) and you'll see TM 45 (Thunder Wave).
Route 25 is filled with many trainers. You'll find Hikers, Lads, and Lasses. They'll carry a variety of Pokemon so make sure you're ready for anything. You'll also find TM 19, but you need to cut down a bush or get the trainer to move forward to get it. At the end of Route 25 is Bill's Cottage. Pikachu will get a confused look on his face when you first enter the cottage and then look shocked after Bill is transformed. Bill will give you an S.S. Anne ticket and let you look at some Pokemon entries on his computer for your help.
Route 5 and Route 6
There is a house in the center path here. The man here will raise your Pokemon. You pay $500 for entrance and $100 for each level he raises your pokemon. After a certain level he won't raise them anymore. You may also miss the levels that they evolve at.
There is also a girl here at the entrance of the tunnel to Vermillion. She will trade you a Machoke for your Cubone. The Machoke then evolves into a Machamp.
Route 6 has a few trainers: 4 Junior Trainers and 2 Bug Catchers. One of the Bug Catchers has a Butterfree so keep an eye out.
E. Vermillion City
Vermillion and the area surrounding it is quite busy. In Vermillion you get the Old Rod from the Fisherman on the far left of the town, but you can only catch Magikarp with it. There is also a Pokemon Club in this city. Talk to the leader and if you listen to his ramblings he'll give you a Bike Voucher. Standing in the the street , you'll see Officer Jenny. After you beat Lt. Surge she'll give you Squirtle.
Vermillion's gym is fairly simple to beat if you have a ground pokemon. There are three trainers in the first room. All of them have electric pokemon like Magnemite and Voltorb. Lt. Surge has a level 28 Raichu. It's somewhat difficult to beat even, but Dig will help out a lot.
S.S. Anne
There are lots of trainers on board the S.S. Anne. When you first come in the boat if you go to your left then down you'll find the kitchen. A Great Ball was accidently thrown in one of the trash cans here. The set of stairs on the way to kitchen will take you to the same floor Gary is on. He's on the far right of the ship before the Captain's quarters. After you beat him talk to the Captain and he'll give you Cut. Don't leave the ship if you want to fight the other trainers. If all your pokemon faint you can leave the ship without it setting sail. There's a rumor that involves this, but I haven't tested it yet.
Diglett Tunnel
Diglett Tunnel is the only land connection between the first two towns and the rest of the island. It'll bring you out on Route 2 next to Viridian Forest. You'll need Cut to hack away the bushs that block your way. In the the little house outside Diglett Tunnel a little kid will want to trade you his Mr. Mime for a Clefairy. After that you'll find a large building with one of Prof. Oak's aids. He'll give you Flash if you have at least 10 Pokemon. Going out the other side you'll find a few pick-ups including a Moonstone. Then you can get Dream Eater from the kid in Viridian City.
When you head back to Cerulean you might want to go through Mt. Moon if you want to train Bulbasaur and Squirtle quickly.
Route 11
There are lots of trainers on Route 11. You may have to go back to the Pokemon center a few times before you defeat all the trainers here. There's a lot of grass, which means plenty of opportunities to catch pokemon. You'll find one of your first psychics here, Drowzee. When you reach the gate on the other side you'll receive the Item FInder if you have 30 pokemon. Then you'll be able to find hidden items on the ground.
Route 9 starts out of Cerulean City and ends shortly before Rock Tunnel. There will be a few trainers on the way. The TM for Teleport is found at the beginning of Route 9. I believe there may also be Nidoranas, Nidoranos, and Raticates on Route 9 if you look long enough.
Route 10 begins above the Pokemon Center outside of Rock Tunnel and continues on the other side entering Lavender Town. There's very little on either end, just a few trainers. However, at the beginning of Route 10 there is a break in the fence. Surf down the stream you find here to get to the Power Plant.
Power Plant
There are a lot of electric pokemon here (duh!). It'll look like there are a lot of items lying around but many of these are level 43 Voltorbs and Electrodes. You'll also find one of the legendary birds at the end. It's very difficult to catch so save before you fight it. Sleep is the best status change to use on it. If you have Articuno use it because unlike other birds Zapdos isn't vunerable against electric. Remember to stock up on Ultraballs before facing it.
There is also a man who has Lickitung before you enter the Power Plant, but he's not interested in trading.
F. Lavender Town
There's not much life in Lavendar Town; in fact, it's home of Pokemon Tower, the place where Pokemon are layed to rest. There's not much you can do here at first. If you go into Pokemon Tower you'll face Gary. He's picked up a few more pokemon. Until you get the Silph Scope all you'll see here is ghosts.
After you return with the Silph Scope you'll be able to see that the ghosts are really wild Ghastlies and Haunters. You'll face many Channellers who usually have a Ghastly. Before you can reach the top floor you'll have to face a level 30 Marowak. On the top floor you'll face Jesse and James. (By now Ekans has evolved to Arbok and Koffing to Wheezing.) After defeating them Mr. Fuji will take you back to his home and give you the Pokeflute.
Route 8 and Route 7
There are several trainers on Route 8, but nothing to worry about. They care a good variety of pokemon including fire, plant, and water pokemon. There are two small patches of grass where wild pokemon can be found, one on each route. Look for hiddens items in the tunnel connecting the two routes.
G. Celadon City
There's plenty to see in Celadon City. First there's a huge Pokemart where you can by almost anything. Of course there's a gym as well. It's run by women who specialize in plant pokemon. Take a bug pokemon, a psychic pokemon, or a fire pokemon and it should be no problem. (Why not take all three?) The gym leader will give you the TM for Megadrain.
Celadon City is also home to the Game Corner, Team Rocket's secret hideout. You can play the slots to win prizes (TM's and pokemon, I'll get a list later) or you can infiltrate their operation . You'll face many Team Rocket members before facing Jesse and James. They're guarding the entrance to Giovanni's quarters. After defeating them you'll face Giovanni; he's got a Persian and Ryhdon as well as others. After defeating him you'll recieve the Silph Scope.
You'll also find the only Eevee in the game in Celadon Mansion. If you go in the front you'll see a few people to talk to, but eventually find a dead end on the roof top. When you go in the back you'll be able to reach a small room on the roof where a man will tell you about pokemon training. He'll also give you an Eevee.
Route 16
Just outside Celadon you'll see a bush you can cut down. It will lead you to a small secret house where a trainer will give you HM 02, Fly. There are also a few pokemon in a grass patch here including Doduo, Spearow, Fearow, Rattata, and Raticate.
One of two Snorlax is found on Route 16. You'll need the Pokeflute to wake him up. He's a difficult pokemon to beat. I suggest using a pokemon that can put Snorlax to sleep before it gets the chance to use Rest to refill its energy.
Route 17 and Route 18
Route 17 begins the slope of Bicycling Trail. There are many trainers here who carry pokemon like Grimer, Wheezing, and Machop. It would probably be best to carry a pychic with you here. There's also a patch of grass where you can catch pokemon and numerous opportunities to fish.
At the very end of Bicycling Trail, a chef will trade you a Tangela for a Parasect.
H. Saffron City
The first goal in Saffron is to free the Silph building from the hands of Team Rocket. If you're familiar with the Silph Co. building in the Red/Blue versions then this is no problem. Everything is in the same place. Be sure you have room for all the items you'll find here. Team Rocket's leader, Giovanni, has a Rhydon, a Persian, and a Nidoqueen. Take care of them with a plant/water pokemon, ground pokemon, and ice pokemon, respectively.
There are two gyms in Saffron; one a fighting gym, the other a psychic gym. A ghost or psychic will do well if the fighting gym, but you can use almost any pokemon here. In the psychic gym you should use a bug pokemon. (Many people say ghost, but they're very wrong.) You'll have to go through a maze of warp tiles before you find the gym leader which means you'll also have to fight a few battles. Sabrina, the gym leader, will have an Abra, a Kadabra, and an Alakazam (all at level 50!). She'll give you TM 46, Psywave.
There are a few places you'll want to visit in Saffron. Find the Copycat's house she'll give you TM ,Mimic, if you give her a Pokedoll (found in Celadon Dept Store). Also visit Mr. Pyschic's home and he'll give you the very powerful TM 29, Psychic.
I. Fuchsia City
The most important place in Fuchsia City is probably the Safari zone. (Again more later, when I've got more time to explore and find out what pokemon are native there.) There are many rare pokemon there, but they're a bit difficult to catch because of the Safari Balls. For $500 you get 30 Safari Balls (barely enough to catch the decent pokemon) or 400 paces whichever comes first.
In the Safari Zone you'll find several TM's and HM 03, Surf. You'll also find a pair of Gold Teeth to give to the Safari Zone Warden in exchange for HM 04, Strength. You'll also find the eldest of the fishermen, who will give you the Best Rod (able to catch a variety of water pokemon).
The gym in Fuchsia is one of the more difficult ones. It's trainers carry a mixture of psychic and poison pokemon. I actually had to try this gym twice before I beat it. There's also an invisible maze to go throught before you face Koga, the gym leader. (In the American version you can see the walls a little, but not here. Completely invisible.) Koga has three Venonat and a Venomoth all above level 50. He'll give you TM 06. It contains Toxic, a very powerful poison move that inflicts more damage each time it works.
After this I usually backtrack along routes 12, 13, 14, and 15 before heading to the Seafoam Islands.
Route 12 and Route 13
In Route 12 you'll face Fishermen. It's a good place to train a plant or electric pokemon. It's also the location of the second Snorlax. You'll find two TM's on this path TM 39, Swift, and TM 16, Payday. As you can see it's the home to several pokemon as well.
On Route 13 you'll face many more trainers. There are quite a few bird trainers and another opportunity to train electric pokemon. Also look for the hidden PP up.
Route 14 and Route 15
Like routes 12 and 13 these routes are so similiar I've just combined them into one section. Aside from a lot of trainers and wild pokemon there's not that much here. However, you do find TM 20 here. It contains Rage.
Route 19
There are a lot of swimmers on Route 19. The only pokemon you'll run into while surfing is Tentacool. Before you begin surfing you'll see a little hut on the beach. This is the surfer dude's home. If you have the rare surfing Pikachu you'll be able to play a surfing mini-game.
Seafoam Islands
You'll need Strength here to move boulders or you'll never be able to get through. There are very swift currents in the water in cave so you'll have to block off the stream. Until you do this you won't be able to get to the exit or to Articuno.
Articuno is more difficult to catch than most pokemon, but not as hard as the other legendary birds. Weaken it as much as you can without knocking it out. Then you should put it to sleep. Other status changes work too, but sleep is the best to use. After it's asleep and weak throw Ultraballs at it. It may still break free a few times though. My best advice would be to save the game immediately before facing it.
Route 20 and Route 21
There are a lot of trainers on these routes surrounding Cinnabar Island. You'll probably be weak coming out of the cave on Seafoam Island so it's best to avoid trainers until you've had a chance to heal your pokemon. Once you've done that surf back and mop the floor with them. Trainers on Route 20 are Swimmers; there's a mix of Swimmers, Fishermen, and Birdkeepers on Route 21. At the end of Route 21 there is a small patch of grass before heading back to Pallet Town.
J. Cinnabar Island
There is a lab on Cinnabar Island where you can get your pokemon fossils revived. You can get either the Helix fossil or the Dome fossil in Mt. Moon and the old amber from the museum in Pewter. The old amber will become Areodactyl; the Helix Fossil becomes Omanyte; the Dome Fossil becomes Kabuto.
The burned out laboratory is a fairly big maze. There are a lot of items scattered throughout it including TM 22, Solarbeam. The one item you're looking for in particular is the Secret Key which you use to open the door on to Cinnabar's gym. They're are only a few people in this large building: two burglars and three scientist. You can also read the journal kept about the lab's experience with Mew and Mewtwo.
After finding the key head to the gym. You will have to answer a series of questions to pass through the gym. (You answer these questions at the machines that look like recorders.) If you answer incorrectly you will have to defeat a trainer. If you answer correctly you will be able to pass by, but still fight the trainer if you wish.
Finally you'll flace Blaine; his Pokemon are Ninetails lvl 48, Rapidash lvl 50, and Arcanine lvl 50. Water Pokemon will make quick work of him. Or you can use a ground Pokemon if you haven't trained a water one.
The Final Gym
It's your final great challenge before heading to the Pokemon League. It's a ground type gym, but there's a good deal of variety so keep on your toes. A well balanced team is really what you need here, but put a special emphasis on Plant and Water pokemon. I would have at least three Pokemon at level 45 or higher before facing Giovanni. He has a Dugtrio lvl 50, Persian lvl 53, Nidoqueen lvl 53, and Ryhorn lvl 55. Squirtle will be a great help here, especially if you've taught him icebeam.
K. Victory Road
As you all know to become a Pokemon Champion you must defeat the Elite Four and your rival in the ultimate final battle. You must beat all 5 trainers consecutively; there is no turning back.
Lorlei - Trainer of Ice Pokemon
Lorlei starts off the battle with her level 54 Dewgong, followed by a level 53 Cloister, a level 54 Slowbro, a level 56 Jynx, and finishing off with a level 56 Lapras. Pikachu can take care of all of these easily, but I like to use Charizard against Jynx since it's about the only ice Pokemon that isn't water as well.
Bruno - Master of Rock Solid Defense
Bruno has two Onix, and begins the battle with the level 53 Onix. After the first Onix he sends out a a level 55 Hitmonchan. Beware because it has Ice Punch and Fire Punch to take care of some of your elemental Pokemon. Next comes a level 55 Hitmonlee, followed by the second Onix at level 56. Finishing up is a level 58 Machamp. Venusaur or Blastoise can take care of the Onix, but be sure to have a Psychic pokemon to take out the three Fighting Pokemon.
Agatha - Mistress of Ghost Pokemon
Agatha begins the battle with her level 56 Gengar. She follows through with a level 56 Golbat and a level 55 Haunter. Finishing the battle is Arbok, level 58, and another Gengar at level 60. A Psychic Pokemon makes quick work of her team.
Lance - The Dragon Master
Lance launches his assult with a level 58 Gyarados. Following this is two of his three Dragon Pokemon, both level 56 Dragonair. Ice Pokemon works best against them, but beware Dragon's can learn a variety of moves including electric which may make your Ice Pokemon weak against them. After the Dragonair you'll face a level 60 Aerodactyl and finally a level 62 Dragonite. Ice Pokémon are the best choice here.
Gary - The Final Battle
Gary's got a well balanced team. He starts off with a Sandslash at level 62. His choice for a Psychic Pokemon is a level 59 Alakazam. His plant, electric, and water choices include Exeggcutor at level 61, Magneton at level 61, and Cloyster at level 62. He finishes the battle with his original Pokemon, but he's evolved it into a Flareon now at level 65. The only advice I have to offer is to have a well-balanced team to deal with them.
When you defeat Gary, you have beaten the game! Congratulations!