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.
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.
Route plan
Bring Repels if Zubat/Geodude density wears you down. Water, Grass, and Fighting coverage handle most hikers.
Wild Pokemon
Each area below has its own table, split into encounter method bands: tall grass / cave floor, Surfing, the three rods, then gift, trade, prize, and static rows. Grass and Surf rows merge every Gen I wild slot for a species and show the combined odds out of 256 (slot rates 51/256, 51/256, 39/256, 25/256, 25/256, 25/256, 13/256, 13/256, 11/256, and 3/256). Generation I has no time-of-day split, so no rate varies with the clock; a — note means the row needs nothing beyond reaching the area.
Rock Tunnel 1F
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
 Zubat | 15-21 | 50% | — |
 Geodude | 16-20 | 39% | — |
 Machop | 17-21 | 11% | — |
Rock Tunnel B1F
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
| Zubat | 20-22 | 39% | — |
| Geodude | 17-21 | 30% | — |
| Machop | 18-20 | 20% | — |
 Onix | 14-22 | 11% | — |
Trainers
| Route order | Trainer | Team | Reward | Optional / rematch note |
|---|---|---|---|---|
| 1. Rock Tunnel 1F (7, 5) |  HikerParty #12 | $665 | One-time trainer; no rematch in Yellow. | |
| 2. Rock Tunnel 1F (5, 16) | HikerParty #13 | $700 | One-time trainer; no rematch in Yellow. | |
| 3. Rock Tunnel 1F (17, 15) | HikerParty #14 | $735 | One-time trainer; no rematch in Yellow. | |
| 4. Rock Tunnel 1F (23, 8) |  PokemaniacParty #7 | $1,150 | One-time trainer; no rematch in Yellow. | |
| 5. Rock Tunnel 1F (37, 21) |  Jr. Trainer FParty #17 | $440 | One-time trainer; no rematch in Yellow. | |
| 6. Rock Tunnel 1F (22, 24) | Jr. Trainer FParty #18 | $400 | One-time trainer; no rematch in Yellow. | |
| 7. Rock Tunnel 1F (32, 24) | Jr. Trainer FParty #19 | $380 | One-time trainer; no rematch in Yellow. | |
| 8. Rock Tunnel B1F (11, 13) | Jr. Trainer FParty #9 | $420 | One-time trainer; no rematch in Yellow. | |
| 9. Rock Tunnel B1F (6, 10) | HikerParty #9 | $735 | One-time trainer; no rematch in Yellow. | |
| 10. Rock Tunnel B1F (3, 5) | PokemaniacParty #3 | $1,000 | One-time trainer; no rematch in Yellow. | |
| 11. Rock Tunnel B1F (20, 21) | PokemaniacParty #4 | $1,100 | One-time trainer; no rematch in Yellow. | |
| 12. Rock Tunnel B1F (30, 10) | HikerParty #10 | $875 | One-time trainer; no rematch in Yellow. | |
| 13. Rock Tunnel B1F (14, 28) | Jr. Trainer FParty #10 | $440 | One-time trainer; no rematch in Yellow. | |
| 14. Rock Tunnel B1F (33, 5) | HikerParty #11 | $700 | One-time trainer; no rematch in Yellow. | |
| 15. Rock Tunnel B1F (26, 30) | PokemaniacParty #5 | $1,250 | One-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 is a single-game guide with no day/night encounter split; each area table groups species under method bands with Levels, Rate, and Notes columns.