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Pokemon Red and Blue Phase 3: Thunder Badge Walkthrough

Thunder Badge

Phase 3 of the Pokemon Red and Blue walkthrough covering Routes 5/6, Underground Path, Vermilion, S.S. Anne, Lt. Surge, Diglett's Cave, and Route 11 cleanup.

By Damodar Sharma Updated June 19, 2026 Walkthrough

Routes 5/6, Underground Path, Vermilion, S.S. Anne, Lt. Surge, Diglett's Cave, and Route 11 cleanup.

Phase 3

Target22-26 RewardThunder Badge, HM01 Cut, Old Rod, Bike Voucher, HM05 Flash access Sections4
Charizard Red and Blue sprite Blastoise Red and Blue sprite

Phase Sections

Phase Data Rollup

Version

Routes 5 and 6 with Underground Path

Use the Underground Path to reach Vermilion while Saffron's guards block the direct gates.

Source maps

Route 5, Underground Path North South, Underground Path Route 5, Underground Path Route 6, and Route 6.

Wild rows15 Trainers6 Items2

Route plan

Route 6 has several avoidable double-line trainers; clear them for Surge levels or save them for later.

Route 5

Route 5 wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Pidgey Red and Blue sprite Pidgey RB13-1640%
Oddish Red and Blue sprite Oddish RB13-1635%
Bellsprout Red and Blue sprite Bellsprout RB13-1635%
Mankey Red and Blue sprite Mankey RB10-1625%
Meowth Red and Blue sprite Meowth RB10-1625%

Route 6

Route 6 wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Pidgey Red and Blue sprite Pidgey RB13-1640%
Oddish Red and Blue sprite Oddish RB13-1635%
Bellsprout Red and Blue sprite Bellsprout RB13-1635%
Mankey Red and Blue sprite Mankey RB10-1625%
Meowth Red and Blue sprite Meowth RB10-1625%
Fishing — Old Rod
Magikarp Red and Blue sprite Magikarp RB5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Red and Blue sprite Goldeen RB1050%Any fishable water tile after getting Good Rod.
Poliwag Red and Blue sprite Poliwag RB1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Krabby Red and Blue sprite Krabby RB1550.0%Super Rod group 4.
Shellder Red and Blue sprite Shellder RB1550.0%Super Rod group 4.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Route 6 (10, 21)Jr. Trainer M trainer spriteJr. Trainer MParty #4$400One-time trainer; no rematch in Red/Blue.
2. Route 6 (11, 21)Jr. Trainer F trainer spriteJr. Trainer FParty #2$320One-time trainer; no rematch in Red/Blue.
3. Route 6 (0, 15)Bug Catcher trainer spriteBug CatcherParty #10$160One-time trainer; no rematch in Red/Blue.
4. Route 6 (11, 31)Jr. Trainer M trainer spriteJr. Trainer MParty #5$320One-time trainer; no rematch in Red/Blue.
5. Route 6 (11, 30)Jr. Trainer F trainer spriteJr. Trainer FParty #3$320One-time trainer; no rematch in Red/Blue.
6. Route 6 (19, 26)Bug Catcher trainer spriteBug CatcherParty #11$200One-time trainer; no rematch in Red/Blue.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
Full RestoreHidden itemHidden on the searchable tile at (3, 4) in Underground Path North South.(3, 4)Press A on the hidden tile or use the Itemfinder nearby.
X SpecialHidden itemHidden on the searchable tile at (4, 34) in Underground Path North South.(4, 34)Press A on the hidden tile or use the Itemfinder nearby.

Completion Checklist

  • Search Underground Path hidden items.
  • Clear Route 6 trainers.
  • Catch version exclusives before Vermilion if desired.

Vermilion City and S.S. Anne

Board the S.S. Anne, loot every cabin, beat the Rival, and get Cut from the captain.

Source maps

Vermilion City, Vermilion Old Rod House, Vermilion Trade House, Pokemon Fan Club, S.S. Anne 1F, S.S. Anne 1F Rooms, S.S. Anne 2F, and S.S. Anne 2F Rooms, and 6 more map files.

Wild rows11 Trainers14 Items13

Route plan

Do all ship rooms before helping the captain if you want every trainer and item; the ship leaves after the Cut event.

Vermilion City

Vermilion City wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Fishing — Old Rod
Magikarp Red and Blue sprite Magikarp RB5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Red and Blue sprite Goldeen RB1050%Any fishable water tile after getting Good Rod.
Poliwag Red and Blue sprite Poliwag RB1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Krabby Red and Blue sprite Krabby RB1550.0%Super Rod group 4.
Shellder Red and Blue sprite Shellder RB1550.0%Super Rod group 4.

Vermilion Dock

Vermilion Dock wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Fishing — Old Rod
Magikarp Red and Blue sprite Magikarp RB5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Red and Blue sprite Goldeen RB1050%Any fishable water tile after getting Good Rod.
Poliwag Red and Blue sprite Poliwag RB1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Krabby Red and Blue sprite Krabby RB1550.0%Super Rod group 4.
Shellder Red and Blue sprite Shellder RB1550.0%Super Rod group 4.

Vermilion Trade House

Vermilion Trade House wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
In-game trade
Farfetch'd Red and Blue sprite Farfetch'd RBTradedGiftTrade Spearow for Farfetch'd (DUX). This gives Farfetch'd.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. S.S. Anne 1F Rooms (2, 3)Gentleman trainer spriteGentlemanParty #1$1,260One-time trainer; no rematch in Red/Blue.
2. S.S. Anne 1F Rooms (11, 4)Gentleman trainer spriteGentlemanParty #2$1,330One-time trainer; no rematch in Red/Blue.
3. S.S. Anne 1F Rooms (11, 14)Youngster trainer spriteYoungsterParty #8$315One-time trainer; no rematch in Red/Blue.
4. S.S. Anne 1F Rooms (13, 11)Lass trainer spriteLassParty #11$270One-time trainer; no rematch in Red/Blue.
5. S.S. Anne 2F Rooms (10, 2)Gentleman trainer spriteGentlemanParty #3$1,610One-time trainer; no rematch in Red/Blue.
6. S.S. Anne 2F Rooms (13, 4)Fisherman trainer spriteFishermanParty #1$595One-time trainer; no rematch in Red/Blue.
7. S.S. Anne 2F Rooms (0, 14)Gentleman trainer spriteGentlemanParty #5$1,190One-time trainer; no rematch in Red/Blue.
8. S.S. Anne 2F Rooms (2, 11)Lass trainer spriteLassParty #12$270One-time trainer; no rematch in Red/Blue.
9. S.S. Anne B1F Rooms (0, 13)Sailor trainer spriteSailorParty #3$630One-time trainer; no rematch in Red/Blue.
10. S.S. Anne B1F Rooms (2, 11)Sailor trainer spriteSailorParty #4$510One-time trainer; no rematch in Red/Blue.
11. S.S. Anne B1F Rooms (12, 3)Sailor trainer spriteSailorParty #5$540One-time trainer; no rematch in Red/Blue.
12. S.S. Anne B1F Rooms (22, 2)Sailor trainer spriteSailorParty #6$510One-time trainer; no rematch in Red/Blue.
13. S.S. Anne B1F Rooms (0, 2)Sailor trainer spriteSailorParty #7$600One-time trainer; no rematch in Red/Blue.
14. S.S. Anne B1F Rooms (0, 4)Fisherman trainer spriteFishermanParty #2$595One-time trainer; no rematch in Red/Blue.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
TM08 Body SlamVisible item ballVisible item ball at (12, 15) in S.S. Anne 1F Rooms.(12, 15)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max EtherVisible item ballVisible item ball at (12, 1) in S.S. Anne 2F Rooms.(12, 1)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Rare CandyVisible item ballVisible item ball at (0, 12) in S.S. Anne 2F Rooms.(0, 12)Reach this tile; HMs or story flags may be needed for late-game dungeons.
EtherVisible item ballVisible item ball at (20, 2) in S.S. Anne B1F Rooms.(20, 2)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM44 RestVisible item ballVisible item ball at (10, 2) in S.S. Anne B1F Rooms.(10, 2)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max PotionVisible item ballVisible item ball at (12, 11) in S.S. Anne B1F Rooms.(12, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max EtherHidden itemHidden on the searchable tile at (14, 11) in Vermilion City.(14, 11)Press A on the hidden tile or use the Itemfinder nearby.
Hyper PotionHidden itemHidden on the searchable tile at (3, 1) in S.S. Anne B1F Rooms.(3, 1)Press A on the hidden tile or use the Itemfinder nearby.
Great BallHidden itemHidden on the searchable tile at (13, 9) in S.S. Anne Kitchen.(13, 9)Press A on the hidden tile or use the Itemfinder nearby.
Old RodGiftTalk to the Fishing Guru in Vermilion.-Talk to the Fishing Guru in Vermilion.
Bike VoucherKey itemListen to the chairman's Pokemon story.-Listen to the chairman's Pokemon story.
BicycleKey itemExchange the Bike Voucher in Cerulean.-Exchange the Bike Voucher in Cerulean.
HM01 CutHMHelp the captain after the Rival battle.-Help the captain after the Rival battle.

Battle Plan

Major battle Source party Level benchmark Reward
Rival trainer spriteRivalS.S. Anne Rival if you chose Charmander20$1,300
Rival trainer spriteRivalS.S. Anne Rival if you chose Squirtle20$1,300
Rival trainer spriteRivalS.S. Anne Rival if you chose Bulbasaur20$1,300

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Rival trainer spriteRivalS.S. Anne Rival if you chose Charmander$1,300Raticate and the evolved starter make this the first Rival fight with real tempo.Plan around the rival's Squirtle line. Keep status, a fresh switch, and a direct answer to Pidgey/Pidgeotto before committing your starter.
Rival trainer spriteRivalS.S. Anne Rival if you chose Squirtle$1,300Raticate and the evolved starter make this the first Rival fight with real tempo.Plan around the rival's Bulbasaur line. Keep status, a fresh switch, and a direct answer to Pidgey/Pidgeotto before committing your starter.
Rival trainer spriteRivalS.S. Anne Rival if you chose Bulbasaur$1,300Raticate and the evolved starter make this the first Rival fight with real tempo.Plan around the rival's Charmander line. Keep status, a fresh switch, and a direct answer to Pidgey/Pidgeotto before committing your starter.

Completion Checklist

  • Get Old Rod and Bike Voucher.
  • Clear S.S. Anne trainers and cabin items.
  • Beat the ship Rival.
  • Receive HM01 Cut.

Vermilion Gym

Solve the trash-can switch puzzle and earn the Thunder Badge.

Source maps

Vermilion Gym.

Wild rows0 Trainers4 Items1

Route plan

Catch Diglett or Dugtrio first if you want the simplest Surge answer.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Vermilion Gym (5, 1)Lt. Surge trainer spriteLt. SurgeParty #1$2,376One-time trainer; no rematch in Red/Blue.
2. Vermilion Gym (9, 6)Gentleman trainer spriteGentlemanParty #3$1,610One-time trainer; no rematch in Red/Blue.
3. Vermilion Gym (3, 8)Rocker trainer spriteRockerParty #1$500One-time trainer; no rematch in Red/Blue.
4. Vermilion Gym (0, 10)Sailor trainer spriteSailorParty #8$630One-time trainer; no rematch in Red/Blue.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
TM24 ThunderboltGym rewardDefeat Lt. Surge.-Defeat Lt. Surge.

Battle Plan

Major battle Source party Level benchmark Reward
Lt. Surge trainer spriteLt. SurgeLt. Surge24$2,376

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Lt. Surge trainer spriteLt. SurgeLt. Surge$2,376Raichu is fast, hits hard, and can snowball if you let paralysis stack.Diglett or Dugtrio from Diglett's Cave is the clean answer. Geodude/Graveler also walls Electric attacks, while Ivysaur can take hits but does not hit Magnemite-style resistances because those are not Surge's Red/Blue team.

Completion Checklist

  • Cut the tree to enter.
  • Defeat the gym trainers.
  • Find both trash switches without leaving the room.
  • Beat Lt. Surge.

Route 2 Flash, Diglett's Cave, and Route 11

Use Cut and Diglett's Cave to unlock Flash, then clear Route 11 east of Vermilion.

Source maps

Digletts Cave, Route 2, Route 2 Trade House, Route 2 Gate, Route 11, and Route 11 Gate 2F.

Wild rows17 Trainers10 Items5

Route plan

Diglett's Cave is the Surge answer and the route back to Route 2's aide. Route 11 builds levels for Rock Tunnel.

Digletts Cave

Digletts Cave wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Diglett Red and Blue sprite Diglett RB15-2295%
Dugtrio Red and Blue sprite Dugtrio RB29-315.5%

Route 2

Route 2 wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Pidgey Red and Blue sprite Pidgey RB3-545%
Rattata Red and Blue sprite Rattata RB2-540%
Weedle Red and Blue sprite Weedle RB3-515%
Caterpie Red and Blue sprite Caterpie RB3-515%

Route 11

Route 11 wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Ekans Red and Blue sprite Ekans RB12-1540%
Sandshrew Red and Blue sprite Sandshrew RB12-1540%
Spearow Red and Blue sprite Spearow RB13-1735%
Drowzee Red and Blue sprite Drowzee RB9-1525%
Fishing — Old Rod
Magikarp Red and Blue sprite Magikarp RB5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Red and Blue sprite Goldeen RB1050%Any fishable water tile after getting Good Rod.
Poliwag Red and Blue sprite Poliwag RB1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Krabby Red and Blue sprite Krabby RB1550.0%Super Rod group 4.
Shellder Red and Blue sprite Shellder RB1550.0%Super Rod group 4.

Route 2 Trade House

Route 2 Trade House wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
In-game trade
Mr. Mime Red and Blue sprite Mr. Mime RBTradedGiftTrade Abra for Mr. Mime (MARCEL). Requires Cut access from the Route 2 side.

Route 11 Gate 2F

Route 11 Gate 2F wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
In-game trade
Nidorina Red and Blue sprite Nidorina RBTradedGiftTrade Nidorino for Nidorina (TERRY). Upstairs gate trade.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Route 11 (10, 14)Gambler trainer spriteGamblerParty #1$1,260One-time trainer; no rematch in Red/Blue.
2. Route 11 (26, 9)Gambler trainer spriteGamblerParty #2$1,260One-time trainer; no rematch in Red/Blue.
3. Route 11 (13, 5)Youngster trainer spriteYoungsterParty #9$315One-time trainer; no rematch in Red/Blue.
4. Route 11 (36, 11)Engineer trainer spriteEngineerParty #2$1,050One-time trainer; no rematch in Red/Blue.
5. Route 11 (22, 4)Youngster trainer spriteYoungsterParty #10$285One-time trainer; no rematch in Red/Blue.
6. Route 11 (45, 7)Gambler trainer spriteGamblerParty #3$1,260One-time trainer; no rematch in Red/Blue.
7. Route 11 (33, 3)Gambler trainer spriteGamblerParty #4$1,260One-time trainer; no rematch in Red/Blue.
8. Route 11 (43, 5)Youngster trainer spriteYoungsterParty #11$255One-time trainer; no rematch in Red/Blue.
9. Route 11 (45, 16)Engineer trainer spriteEngineerParty #3$900One-time trainer; no rematch in Red/Blue.
10. Route 11 (22, 12)Youngster trainer spriteYoungsterParty #12$270One-time trainer; no rematch in Red/Blue.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
Moon StoneVisible item ballVisible item ball at (13, 54) in Route 2.(13, 54)Reach this tile; HMs or story flags may be needed for late-game dungeons.
HP UpVisible item ballVisible item ball at (13, 45) in Route 2.(13, 45)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Escape RopeHidden itemHidden on the searchable tile at (48, 5) in Route 11.(48, 5)Press A on the hidden tile or use the Itemfinder nearby.
HM05 FlashAide rewardHave at least 10 caught species and reach Oak's aide from Diglett's Cave/Route 2.-Have at least 10 caught species and reach Oak's aide from Diglett's Cave/Route 2.
ItemfinderAide rewardHave at least 30 caught species.-Have at least 30 caught species.

Completion Checklist

  • Catch Diglett or Dugtrio if needed.
  • Get HM05 Flash from Oak's aide with 10 caught species.
  • Clear Route 11 trainers and hidden item.

Sources