Phase 3 section
Pokemon Yellow Routes 5 and 6 with Underground Path Walkthrough
Routes 5 and 6 with Underground Path section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.
Use the Underground Path to reach Vermilion while Saffron's guards block the direct gates. This page is a standalone section for Phase 3: Thunder Badge, with source-backed Yellow encounter, trainer, item, hidden item, and boss data.
Source maps
Route 5, Underground Path North South, Underground Path Route 5, Underground Path Route 6, and Route 6.
Route plan
Route 6 has several avoidable double-line trainers; clear them for Surge levels or save them for later.
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.
Route 5
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
 Pidgey | 15-17 | 39% | — |
 Rattata | 14-16 | 30% | — |
 Abra | 7 | 15% | — |
 Jigglypuff | 3-7 | 11% | — |
 Pidgeotto | 17 | 5.1% | — |
Route 6
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
| Pidgey | 15-17 | 39% | — |
| Rattata | 14-16 | 30% | — |
| Abra | 7 | 15% | — |
| Jigglypuff | 3-7 | 11% | — |
| Pidgeotto | 17 | 5.1% | — |
| Surfing | |||
 Psyduck | 15 | 95% | — |
 Golduck | 15-20 | 5.5% | — |
| Fishing — Old Rod | |||
 Magikarp | 5 | 100% | Any fishable water tile. |
| Fishing — Good Rod | |||
 Goldeen | 10 | 50% | Any fishable water tile after getting Good Rod. |
 Poliwag | 10 | 50% | Any fishable water tile after getting Good Rod. |
| Fishing — Super Rod | |||
| Goldeen | 5 | 25% | Yellow Super Rod slot table. |
| Goldeen | 10 | 25% | Yellow Super Rod slot table. |
| Goldeen | 15 | 25% | Yellow Super Rod slot table. |
| Goldeen | 20 | 25% | Yellow Super Rod slot table. |
Underground Path Route 5
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| In-game trade | |||
 Machoke | Traded | Gift | Trade Cubone for Machoke (RICKY). Trade Cubone for Machoke in the Underground Path gate. |
Trainers
| Route order | Trainer | Team | Reward | Optional / rematch note |
|---|---|---|---|---|
| 1. Route 6 (10, 21) |  Jr. Trainer MParty #10 | $320 | One-time trainer; no rematch in Yellow. | |
| 2. Route 6 (11, 21) |  Jr. Trainer FParty #25 | $400 | One-time trainer; no rematch in Yellow. | |
| 3. Route 6 (0, 15) |  Bug CatcherParty #10 | $160 | One-time trainer; no rematch in Yellow. | |
| 4. Route 6 (11, 31) | Jr. Trainer MParty #5 | $320 | One-time trainer; no rematch in Yellow. | |
| 5. Route 6 (11, 30) | Jr. Trainer FParty #3 | $320 | One-time trainer; no rematch in Yellow. | |
| 6. Route 6 (19, 26) | Bug CatcherParty #11 | $200 | One-time trainer; no rematch in Yellow. |
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| Full Restore | Hidden item | Hidden 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 Special | Hidden item | Hidden 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. |
Boss Strategy
No boss or Rival branch is attached to this section.
Completion Checklist
- Search Underground Path hidden items.
- Clear Route 6 trainers.
- Check Yellow Route 5/6 catches before Vermilion if desired.
- 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.