Phase 1 section
Pokemon Yellow Route 1, Viridian City, and Route 22 Walkthrough
Route 1, Viridian City, and Route 22 section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.
Stock up, catch early Route 1/22 Pokemon, and optionally fight the early Rival west of Viridian. This page is a standalone section for Phase 1: Boulder Badge, with source-backed Yellow encounter, trainer, item, hidden item, and boss data.
Source maps
Route 1, Viridian City, and Route 22.
Route plan
Use Route 1 for first catches, buy supplies in Viridian after the parcel errand, then test your team on Route 22 before the forest.
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 1
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
 Pidgey | 2-7 | 70% | — |
 Rattata | 2-4 | 30% | — |
Route 22
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
 Nidoran M | 2-4 | 30% | — |
 Nidoran F | 2-4 | 30% | — |
 Mankey | 3-5 | 20% | — |
 Spearow | 2-6 | 11% | — |
| Rattata | 3 | 9.8% | — |
| 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 | |||
| Poliwag | 5 | 25% | Yellow Super Rod slot table. |
| Poliwag | 10 | 25% | Yellow Super Rod slot table. |
| Poliwag | 15 | 25% | Yellow Super Rod slot table. |
 Poliwhirl | 15 | 25% | Yellow Super Rod slot table. |
Viridian City
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| 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 | |||
| Poliwag | 5 | 25% | Yellow Super Rod slot table. |
| Poliwag | 10 | 50% | Yellow Super Rod slot table. |
| Poliwag | 15 | 25% | Yellow Super Rod slot table. |
Trainers
No regular trainers are sourced for this section.
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| Potion | Hidden item | Hidden on the searchable tile at (14, 4) in Viridian City. | (14, 4) | Press A on the hidden tile or use the Itemfinder nearby. |
| Potion | Gift | Talk to the Poke Mart clerk on Route 1. | - | Talk to the Poke Mart clerk on Route 1. |
| TM42 Dream Eater | Gift | Requires Cut; talk to the sleeping man in west Viridian later. | - | Requires Cut; talk to the sleeping man in west Viridian later. |
Boss Strategy
| Boss / branch | Team | Reward | Danger notes | Practical counters |
|---|---|---|---|---|
 RivalRoute 22 early Rival | $280 | Spearow plus Eevee can overwhelm an underleveled team before Brock. | Train Pikachu and at least one backup first. Winning this optional fight after winning Oak's Lab pushes the Rival toward the Jolteon branch. |
Completion Checklist
- Catch Pidgey/Rattata basics and Route 22 Brock support.
- Pick up the hidden Viridian Potion.
- Fight or skip the optional Route 22 Rival before Brock.
- 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.