Appendix:Yellow walkthrough/Section 4

This is the Bulbapedia walkthrough for Pokémon Yellow.
These pages follow the original Game Boy iteration, not Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!. The guide for those games can be found here.

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Route 3

Route 3

Route 3 is a grassy road that leads east from Pewter City into the mountains around Route 4. Many Trainers can be found along the way as they raise their Pokémon for the upcoming cave.

Trainers

Trainer Pokémon Lass Reward: $135 Pidgey Lv.9 No item Pidgey Lv.9 No item Bug Catcher Reward: $100 Caterpie Lv.10 No item Weedle Lv.10 No item Caterpie Lv.10 No item Youngster Reward: $165 Rattata Lv.11 No item Ekans Lv.11 No item Bug Catcher Reward: $90 Weedle Lv.9 No item Kakuna Lv.9 No item Caterpie Lv.9 No item Metapod Lv.9 No item Youngster Reward: $210 Spearow Lv.14 No item Lass Reward: $150 Rattata Lv.10 No item Nidoran♂ Lv.10 No item Bug Catcher Reward: $110 Caterpie Lv.11 No item Metapod Lv.11 No item Lass Reward: $210 Jigglypuff Lv.14 No item

Available Pokémon
Pokémon Games Location Levels Rate Spearow R B Y Grass 8-12 55% Rattata R B Y Grass 10, 12 15% Sandshrew R B Y Grass 8, 10 15% Mankey R B Y Grass 9 15% A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Route 4 (West)

The Magikarp Salesman

A Pokémon Center stands near the entrance to Mt. Moon. Inside, a shady man offers to sell you a Magikarp for $500. The fish is nearly useless until it evolves into the powerful Gyarados at level 20. With enough money to spare, you can end up with a strong Water-type Pokémon sooner than normal, but you can soon hook a Magikarp for free with the right fishing rod.

Available Pokémon
Pokémon Games Location Levels Rate Gift Pokémon Magikarp R B Y Gift 5 Purchase for $500 A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Mt. Moon

Mt. Moon, 1F

Mt. Moon, B1F

Mt. Moon, B2F

Mt. Moon is a mystical mountain that is known for its frequent meteor falls. The shards of stars that fall here are known as Moon Stones. There are many Trainers exploring the tunnels inside. Many cave-dwelling Pokémon, like Zubat and Paras, make their home here.

Trainers

1F Trainer Pokémon Lass Reward: $210 Clefairy Lv.14 No item Bug Catcher Reward: $110 Weedle Lv.11 No item Kakuna Lv.11 No item Super Nerd Reward: $275 Magnemite Lv.11 No item Voltorb Lv.11 No item Bug Catcher Reward: $100 Caterpie Lv.10 No item Metapod Lv.10 No item Caterpie Lv.10 No item Lass Reward: $165 Oddish Lv.11 No item Bellsprout Lv.11 No item Youngster Reward: $150 Rattata Lv.10 No item Rattata Lv.10 No item Zubat Lv.10 No item Hiker Reward: $350 Geodude Lv.10 No item Geodude Lv.10 No item Onix Lv.10 No item B2F Trainer Pokémon Rocket Reward: $330 Sandshrew Lv.11 No item Rattata Lv.11 No item Zubat Lv.11 No item Rocket Reward: $360 Zubat Lv.12 No item Ekans Lv.12 No item Rocket Reward: $390 Rattata Lv.13 No item Zubat Lv.13 No item Super Nerd Reward: $300 Grimer Lv.12 No item Voltorb Lv.12 No item Koffing Lv.12 No item

Available Pokémon

1F Pokémon Games Location Levels Rate Zubat R B Y Cave 6-11 75% Geodude R B Y Cave 10 20% Sandshrew R B Y Cave 12 4% Clefairy R B Y Cave 11 1% A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here. B1F Pokémon Games Location Levels Rate Zubat R B Y Cave 8-11 65% Geodude R B Y Cave 10-11 20% Paras R B Y Cave 9, 11 10% Clefairy R B Y Cave 10, 12 5% A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here. B2F Pokémon Games Location Levels Rate Zubat R B Y Cave 10-13 60% Paras R B Y Cave 13 15% Geodude R B Y Cave 11 15% Clefairy R B Y Cave 9, 11, 13 10% A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Items

Item Location Games 1F TM12 (Water Gun) In the chamber to the west of the entrance  Y  Potion ×2 In the chamber to the west of the entrance Southeast area, on the opposite side of the wall from the entrance  Y  Rare Candy Southeast corner, east of the Super Nerd  Y  Escape Rope East-southeast area, north of the Rare Candy  Y  Moon Stone Northwest corner  Y  B2F HP Up South; accessible via the first ladder found on 1F  Y  TM01 (Mega Punch) Northeast; accessible via the second ladder found on 1F  Y  Ether Northeast; accessible via the second ladder found on 1F, on a rock (hidden)  Y  Moon Stone Main chamber; southeast of the stairway near the fossils, on a white wall tile (hidden)  Y  Dome Fossil Main chamber; choice between the two Fossils, after defeating the Super Nerd on the northwest platform  Y  Helix Fossil

1F

Collect TM12 (Water Gun) and the Potion to the west, then follow the tunnel eastward and climb down the first ladder.

B2F (South)

Battle the Team Rocket Grunt, then grab the HP Up from the raised platform and take the ladder back to 1F.

1F

Go south to battle the next two Trainers. Be sure to collect the Potion, Rare Candy, and Escape Rope. Head north then west and climb down the second ladder.

B2F (Northeast)

Fight the second Team Rocket Grunt and pick up TM01 (Mega Punch) from the platform. Inspect the large rock to find a hidden Ether before returning to 1F.

1F

Continue westward along the tunnel. Grab the Moon Stone in the northwest corner, then take the third ladder to the lower floor.

B2F (Outer Area)

Follow the winding tunnel in a clockwise direction to the northwest, where a Super Nerd claims both the Dome Fossil and Helix Fossil lying here as his own. Defeat him, and he lets you choose one of them for yourself. The Dome Fossil was once a Kabuto, while the Helix Fossil was once an Omanyte. Go west to the final stairway and you are ambushed by a pair of Team Rocket Grunts. They intend to steal the fossil you just acquired, and draw you into battle.

Rocket Mt. Moon Yellow Reward: $420 Type: Poison Unknown Ekans Lv.14 Wrap Normal   --       Leer Normal   --       Poison Sting Poison   --       Struggle Normal   --       Type: Normal Unknown Meowth Lv.14 Scratch Normal   --       Growl Normal   --       Bite Normal   --       Struggle Normal   --       Type: Poison Unknown Koffing Lv.14 Tackle Normal   --       Smog Poison   --       Struggle Normal   --       Struggle Normal   --

Afterward, the pair disappears, leaving you free to climb the final ladder to the exit.

Route 4 (East)

Route 4

Route 4 is a one-way road leading downhill from the mountains to Cerulean City.

Available Pokémon
Pokémon Games Location Levels Rate Spearow R B Y Grass 8-12 55% Rattata R B Y Grass 10, 12 15% Sandshrew R B Y Grass 8, 10 15% Mankey R B Y Grass 9 15% A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Items
Item Location Games Great Ball On the northwest hill (hidden)  Y  TM04 (Whirlwind) Second-highest level of the eastern hill  Y

← Part 3 Viridian Forest, Route 2, Pewter City, Pewter Gym

Yellow walkthrough

Cerulean City, Cerulean Gym, Route 24, Route 25, Route 5 Part 5 →

This article is part of Project Walkthroughs, a Bulbapedia project that aims to write comprehensive step-by-step guides on each Pokémon game.