Pokedex Randomizer

Phase 4 section

Pokemon Yellow Rock Tunnel Walkthrough

Rock Tunnel section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.

By Damodar Sharma Updated June 23, 2026 Walkthrough

Navigate both floors and exit to Lavender Town. This page is a standalone section for Phase 4: Rainbow Badge, with source-backed Yellow encounter, trainer, item, hidden item, and boss data.

Source maps

Rock Tunnel 1F and Rock Tunnel B1F.

Wild rows7 Trainers15 Items0

Route plan

Bring Repels if Zubat/Geodude density wears you down. Water, Grass, and Fighting coverage handle most hikers.

Wild Pokemon

Area / subarea Game Method Pokemon Level Odds Condition / requirement
Rock Tunnel 1FYellowTall grass / cave floor Zubat Yellow sprite Zubat 15-2150%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel 1FYellowTall grass / cave floor Geodude Yellow sprite Geodude 16-2039%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel 1FYellowTall grass / cave floor Machop Yellow sprite Machop 17-2111%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel B1FYellowTall grass / cave floor Zubat Yellow sprite Zubat 20-2239%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel B1FYellowTall grass / cave floor Geodude Yellow sprite Geodude 17-2130%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel B1FYellowTall grass / cave floor Machop Yellow sprite Machop 18-2020%Encounter rate 15; no time-of-day split in Yellow.
Rock Tunnel B1FYellowTall grass / cave floor Onix Yellow sprite Onix 14-2211%Encounter rate 15; no time-of-day split in Yellow.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Rock Tunnel 1F (7, 5)Hiker trainer spriteHikerParty #12
Geodude Yellow sprite Geodude Lv. 19 Machop Yellow sprite Machop Lv. 19 Geodude Yellow sprite Geodude Lv. 19 Geodude Yellow sprite Geodude Lv. 19
$665One-time trainer; no rematch in Yellow.
2. Rock Tunnel 1F (5, 16)Hiker trainer spriteHikerParty #13
Onix Yellow sprite Onix Lv. 20 Onix Yellow sprite Onix Lv. 20 Geodude Yellow sprite Geodude Lv. 20
$700One-time trainer; no rematch in Yellow.
3. Rock Tunnel 1F (17, 15)Hiker trainer spriteHikerParty #14
Geodude Yellow sprite Geodude Lv. 21 Graveler Yellow sprite Graveler Lv. 21
$735One-time trainer; no rematch in Yellow.
4. Rock Tunnel 1F (23, 8)Pokemaniac trainer spritePokemaniacParty #7
Cubone Yellow sprite Cubone Lv. 23 Slowpoke Yellow sprite Slowpoke Lv. 23
$1,150One-time trainer; no rematch in Yellow.
5. Rock Tunnel 1F (37, 21)Jr. Trainer F trainer spriteJr. Trainer FParty #17
Bellsprout Yellow sprite Bellsprout Lv. 22 Clefairy Yellow sprite Clefairy Lv. 22
$440One-time trainer; no rematch in Yellow.
6. Rock Tunnel 1F (22, 24)Jr. Trainer F trainer spriteJr. Trainer FParty #18
Meowth Yellow sprite Meowth Lv. 20 Oddish Yellow sprite Oddish Lv. 20 Pidgey Yellow sprite Pidgey Lv. 20
$400One-time trainer; no rematch in Yellow.
7. Rock Tunnel 1F (32, 24)Jr. Trainer F trainer spriteJr. Trainer FParty #19
Pidgey Yellow sprite Pidgey Lv. 19 Rattata Yellow sprite Rattata Lv. 19 Rattata Yellow sprite Rattata Lv. 19 Bellsprout Yellow sprite Bellsprout Lv. 19
$380One-time trainer; no rematch in Yellow.
8. Rock Tunnel B1F (11, 13)Jr. Trainer F trainer spriteJr. Trainer FParty #9
Jigglypuff Yellow sprite Jigglypuff Lv. 21 Pidgey Yellow sprite Pidgey Lv. 21 Meowth Yellow sprite Meowth Lv. 21
$420One-time trainer; no rematch in Yellow.
9. Rock Tunnel B1F (6, 10)Hiker trainer spriteHikerParty #9
Geodude Yellow sprite Geodude Lv. 21 Geodude Yellow sprite Geodude Lv. 21 Graveler Yellow sprite Graveler Lv. 21
$735One-time trainer; no rematch in Yellow.
10. Rock Tunnel B1F (3, 5)Pokemaniac trainer spritePokemaniacParty #3
Slowpoke Yellow sprite Slowpoke Lv. 20 Slowpoke Yellow sprite Slowpoke Lv. 20 Slowpoke Yellow sprite Slowpoke Lv. 20
$1,000One-time trainer; no rematch in Yellow.
11. Rock Tunnel B1F (20, 21)Pokemaniac trainer spritePokemaniacParty #4
Charmander Yellow sprite Charmander Lv. 22 Cubone Yellow sprite Cubone Lv. 22
$1,100One-time trainer; no rematch in Yellow.
12. Rock Tunnel B1F (30, 10)Hiker trainer spriteHikerParty #10
Geodude Yellow sprite Geodude Lv. 25
$875One-time trainer; no rematch in Yellow.
13. Rock Tunnel B1F (14, 28)Jr. Trainer F trainer spriteJr. Trainer FParty #10
Oddish Yellow sprite Oddish Lv. 22 Bulbasaur Yellow sprite Bulbasaur Lv. 22
$440One-time trainer; no rematch in Yellow.
14. Rock Tunnel B1F (33, 5)Hiker trainer spriteHikerParty #11
Machop Yellow sprite Machop Lv. 20 Onix Yellow sprite Onix Lv. 20
$700One-time trainer; no rematch in Yellow.
15. Rock Tunnel B1F (26, 30)Pokemaniac trainer spritePokemaniacParty #5
Slowpoke Yellow sprite Slowpoke Lv. 25
$1,250One-time trainer; no rematch in Yellow.

Items And Hidden Items

No visible, hidden, or scripted item rewards are listed for this section.

Boss Strategy

No boss or Rival branch is attached to this section.

Completion Checklist

  • Clear every trainer on 1F and B1F.
  • Catch Machop/Onix/Geodude lines if needed.
  • Exit south to Lavender.
  • Verify the Yellow encounter rows before leaving if you are filling the Pokedex.
  • Use the item rows as a visible-item and hidden-item sweep before moving to the next section.

Sources

  • pret/pokeyellow: wild encounters, trainer parties, trainer money, map object events, hidden event items, rods, trades, and prize Pokemon.
  • Encounter odds aggregate the Gen I ten-slot rates: 51/256, 51/256, 39/256, 25/256, 25/256, 25/256, 13/256, 13/256, 11/256, and 3/256.
  • Yellow has no day/night encounter column; tables use Game, Method, and Condition instead.

Related articles

Pokemon Yellow Walkthrough HubPhase 4: Rainbow BadgePrevious: Routes 9 and 10Next: Lavender Town and Routes 8/7