Appendix:Red and Blue walkthrough/Section 4

This is the Bulbapedia walkthrough for Pokémon Red and Blue Versions. This walkthrough follows the original Game Boy version, not Pokémon FireRed and LeafGreen.
The guide for those can be found here.

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Route 3

Route 3

There are a total of eight Trainers between Pewter City and Mt. Moon, and each one is looking to battle. That may seem daunting, but battling the whole group will leave you a stronger (and wealthier) Trainer.

Trainers

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

Available Pokémon
Pokémon Games Location Levels Rate Pidgey R B Y Grass 6-8 50% Spearow R B Y Grass 5-8 40% Jigglypuff R B Y Grass 3-7 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.

Beyond those Trainers, you finally have an opportunity to find some new Pokémon. The next point of interest is the Poké Center; the shady guy inside near the PC will offer to sell you a Magikarp for $500. The fish itself isn't a great Template:Type2 choice, since it can only splash around until level 15, but with enough training it will evolve into Gyarados at level 20 (with way better stats and moves). It's up to you if you want to fork over the money for the fish here, since they are found almost everywhere with the Old Rod later on. Rest your team before venturing into Mt. Moon.

Mt Moon, 1F

Mt. Moon

Mt. Moon isn't a very tough cave to get through, especially if your team members are around level 15. As this is the first cave you'll explore, there are a handful of new Pokémon here that you would never find out in the sunlight.

Trainers

1F Trainer Pokémon Lass Lass Reward: $210 Clefairy Lv.14 No item Bug Catcher Bug Catcher Reward: $110 Weedle Lv.11 No item Kakuna Lv.11 No item Super Nerd Super Nerd Reward: $275 Magnemite Lv.11 No item Voltorb Lv.11 No item Bug Catcher Bug Catcher Reward: $100 Caterpie Lv.10 No item Metapod Lv.10 No item Caterpie Lv.10 No item Lass Lass Reward: $165 Oddish Lv.11 No item Bellsprout Lv.11 No item Youngster Youngster Reward: $150 Rattata Lv.10 No item Rattata Lv.10 No item Zubat Lv.10 No item Hiker Hiker Reward: $350 Geodude Lv.10 No item Geodude Lv.10 No item Onix Lv.10 No item B2F Trainer Pokémon South side Rocket Rocket Reward: $330 Sandshrew Lv.11 No item Rattata Lv.11 No item Zubat Lv.11 No item East side Rocket Rocket Reward: $360 Zubat Lv.12 No item Ekans Lv.12 No item West side Rocket Rocket Reward: $480 Raticate Lv.16 No item Rocket Rocket Reward: $390 Rattata Lv.13 No item Zubat Lv.13 No item Super Nerd 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 79% Geodude R B Y Cave 8-10 15% Paras R B Y Cave 8 5% Clefairy R B Y Cave 8 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 7-11 60% Geodude R B Y Cave 7-9 26% Paras R B Y Cave 10 10% Clefairy R B Y Cave 9 4% 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 9-12 54% Geodude R B Y Cave 9-10 25% Paras R B Y Cave 10-12 15% Clefairy R B Y Cave 10-12 6% Omanyte R B Y Revive Helix Fossil 30 Only one Kabuto R B Y Revive Dome Fossil 30 Only one 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 B2F

1F

When you first enter the cave, turn to the left and grab the TM12 (Water Gun) and Potion, and defeat the nearby Trainer. Follow the tunnel around and take the first ladder you see to the basement floor.

B2F (south)

Mt Moon, B2F

The presence of a Team Rocket grunt here means that the criminal gang is up to no good somewhere nearby. Grab the HP Up from the ledge and take the stairs back to the first floor.

1F

Head south for two more Trainer battles, as well as a Potion, Rare Candy, and Escape Rope. These are all handy items to have; the Escape Rope will warp you back to the entrance if you need to heal your team, and the Rare Candy can raise a Pokémon's level by 1. Head north and follow the tunnel around to the west, and climb down the next ladder.

B2F (northeast)

A second Team Rocket grunt is loitering here, so get ready to battle! Grab the TM01 (Mega Punch) from the ledge, and check the nearby boulder for a hidden Ether before returning to the main floor.

1F

Follow the tunnel around to the northwest part of the cave, and smack around the last two Trainers along the way. Don't miss the Moon sitting in the corner.

B2F (outer area)

There are two more Rocket grunts standing between you and the exit. Be careful about the next Rocket you find, since his Raticate's Hyper Fang can be a problem. Follow the winding tunnel to the next Rocket grunt, who mutters about the team stealing fossils for profit. Only one Trainer left, a Super Nerd that claims both nearby fossils as his own. After beating him, he offers you the choice of either fossil. Like the Old Amber in Pewter City, the scientists on Cinnabar Island can revive a prehistoric Pokémon from either fossil. The Dome Fossil will become a Kabuto, while the Helix Fossil will become an Omanyte; both become Rock/Water-types. Since you can only get one, you'll have to trade if you want the second. Pick your prize, and follow the tunnel to the exit.

Route 4

Route 4

Available Pokémon
Pokémon Games Location Levels Rate Rattata R B Y Grass 8-12 45% Spearow R B Y Grass 8-12 30% Ekans R B Y Grass 6-12 25% Sandshrew R B Y Grass 6-12 25% 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.

After the trek through Mt. Moon, Route 4 will seem like a walk in the park. There are no Trainers here, and only a small patch of grass to the south. Pick up TM04 (Whirlwind) from the north side of the route, then jump south over the ledge. If you need to train before battling Misty, this is the best place to do it. Once your team is around level 20-25, they should be in good shape.

Next stop, Cerulean City!

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

Red and Blue 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.