Phase 2 section
Pokemon Yellow Route 4 Walkthrough
Route 4 section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.
Exit Mt. Moon, collect the outside Route 4 items, and drop into Cerulean. This page is a standalone section for Phase 2: Cascade Badge, with source-backed Yellow encounter, trainer, item, hidden item, and boss data.
Source maps
Route 4.
Wild rows11 Trainers1 Items2
Route plan
The ledge makes this one-way until later. Finish Mt. Moon before jumping down.
Wild Pokemon
| Area / subarea | Game | Method | Pokemon | Level | Odds | Condition / requirement |
|---|---|---|---|---|---|---|
| Route 4 | Yellow | Tall grass / cave floor |  Spearow | 8-12 | 55% | Encounter rate 20; no time-of-day split in Yellow. |
| Route 4 | Yellow | Tall grass / cave floor |  Mankey | 9 | 15% | Encounter rate 20; no time-of-day split in Yellow. |
| Route 4 | Yellow | Tall grass / cave floor |  Sandshrew | 8-10 | 15% | Encounter rate 20; no time-of-day split in Yellow. |
| Route 4 | Yellow | Tall grass / cave floor |  Rattata | 10-12 | 15% | Encounter rate 20; no time-of-day split in Yellow. |
| Route 4 | Yellow | Old Rod |  Magikarp | 5 | 100% | Any fishable water tile. |
| Route 4 | Yellow | Good Rod |  Goldeen | 10 | 50% | Any fishable water tile after getting Good Rod. |
| Route 4 | Yellow | Good Rod |  Poliwag | 10 | 50% | Any fishable water tile after getting Good Rod. |
| Route 4 | Yellow | Super Rod | Goldeen | 20 | 25% | Yellow Super Rod slot table. |
| Route 4 | Yellow | Super Rod | Goldeen | 25 | 25% | Yellow Super Rod slot table. |
| Route 4 | Yellow | Super Rod | Goldeen | 30 | 25% | Yellow Super Rod slot table. |
| Route 4 | Yellow | Super Rod |  Seaking | 30 | 25% | Yellow Super Rod slot table. |
Trainers
| Route order | Trainer | Team | Reward | Optional / rematch note |
|---|---|---|---|---|
| 1. Route 4 (63, 3) |  LassParty #4 | $465 | One-time trainer; no rematch in Yellow. |
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| TM04 Whirlwind | Visible item ball | Visible item ball at (57, 3) in Route 4. | (57, 3) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Great Ball | Hidden item | Hidden on the searchable tile at (40, 3) in Route 4. | (40, 3) | 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
- Pick up Route 4's visible TM and hidden Great Ball.
- Check the Yellow Route 4 encounter rows before dropping into Cerulean.
- Enter Cerulean stocked for Rival and Misty.
- 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.