Phase 2 section
Pokemon Yellow Mt. Moon Walkthrough
Mt. Moon section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.
Collect the cave items, beat Team Rocket, and choose a fossil. 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
Mt. Moon 1F, Mt. Moon B1F, and Mt. Moon B2F.
Wild rows15 Trainers11 Items10
Route plan
Explore side ladders before the B2F fossil fight. Zubat and Geodude are common; Clefairy is the rare prize.
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.
Mt. Moon 1F
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
 Zubat | 6-11 | 74% | — |
 Geodude | 10 | 20% | — |
 Sandshrew | 12 | 4.3% | — |
 Clefairy | 11 | 1.2% | — |
Mt. Moon B1F
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
| Zubat | 8-11 | 65% | — |
| Geodude | 10-11 | 20% | — |
 Paras | 9-11 | 10% | — |
| Clefairy | 10-12 | 5.5% | — |
Mt. Moon B2F
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Tall grass / cave floor | |||
| Zubat | 10-13 | 54% | — |
| Geodude | 11 | 20% | — |
| Paras | 13 | 15% | — |
| Clefairy | 9-13 | 11% | — |
| Fossil choice | |||
 Kabuto | Revived | Dome Fossil | Choose the Dome Fossil, then revive it later on Cinnabar Island. |
 Omanyte | Revived | Helix Fossil | Choose the Helix Fossil, then revive it later on Cinnabar Island. |
Mt. Moon Pokemon Center
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Purchase gift | |||
 Magikarp | 5 | $500 | Buy from the salesman in the Pokemon Center outside Mt. Moon. |
Trainers
| Route order | Trainer | Team | Reward | Optional / rematch note |
|---|---|---|---|---|
| 1. Mt. Moon 1F (5, 6) |  HikerParty #1 | $350 | One-time trainer; no rematch in Yellow. | |
| 2. Mt. Moon 1F (12, 16) |  YoungsterParty #3 | $150 | One-time trainer; no rematch in Yellow. | |
| 3. Mt. Moon 1F (30, 4) |  LassParty #5 | $165 | One-time trainer; no rematch in Yellow. | |
| 4. Mt. Moon 1F (24, 31) |  Super NerdParty #1 | $275 | One-time trainer; no rematch in Yellow. | |
| 5. Mt. Moon 1F (16, 23) | LassParty #6 | $210 | One-time trainer; no rematch in Yellow. | |
| 6. Mt. Moon 1F (7, 22) |  Bug CatcherParty #7 | $110 | One-time trainer; no rematch in Yellow. | |
| 7. Mt. Moon 1F (30, 27) | Bug CatcherParty #8 | $100 | One-time trainer; no rematch in Yellow. | |
| 8. Mt. Moon B2F (12, 8) | Super NerdParty #2 | $300 | One-time trainer; no rematch in Yellow. | |
| 9. Mt. Moon B2F (15, 22) |  RocketParty #2 | $330 | One-time trainer; no rematch in Yellow. | |
| 10. Mt. Moon B2F (29, 11) | RocketParty #3 | $360 | One-time trainer; no rematch in Yellow. | |
| 11. Mt. Moon B2F (29, 17) | RocketParty #1 | $390 | One-time trainer; no rematch in Yellow. |
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| Potion | Visible item ball | Visible item ball at (2, 20) in Mt. Moon 1F. | (2, 20) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Moon Stone | Visible item ball | Visible item ball at (2, 2) in Mt. Moon 1F. | (2, 2) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Rare Candy | Visible item ball | Visible item ball at (35, 31) in Mt. Moon 1F. | (35, 31) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Escape Rope | Visible item ball | Visible item ball at (36, 23) in Mt. Moon 1F. | (36, 23) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Potion | Visible item ball | Visible item ball at (20, 33) in Mt. Moon 1F. | (20, 33) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| TM12 Water Gun | Visible item ball | Visible item ball at (5, 32) in Mt. Moon 1F. | (5, 32) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| HP Up | Visible item ball | Visible item ball at (25, 21) in Mt. Moon B2F. | (25, 21) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| TM01 Mega Punch | Visible item ball | Visible item ball at (29, 5) in Mt. Moon B2F. | (29, 5) | Reach this tile; HMs or story flags may be needed for late-game dungeons. |
| Moon Stone | Hidden item | Hidden on the searchable tile at (18, 12) in Mt. Moon B2F. | (18, 12) | Press A on the hidden tile or use the Itemfinder nearby. |
| Ether | Hidden item | Hidden on the searchable tile at (33, 9) in Mt. Moon B2F. | (33, 9) | Press A on the hidden tile or use the Itemfinder nearby. |
Boss Strategy
| Boss / branch | Team | Reward | Danger notes | Practical counters |
|---|---|---|---|---|
 Jessie and JamesJessie and James - Mt. Moon B2F | $420 | Ekans, Meowth, and Koffing arrive right after the fossil route and can punish a tired team. | Heal before the fossil room, use Confusion or Ground coverage where possible, and do not let Koffing poison your last healthy answer. |
Completion Checklist
- Collect the Moon Stones and TMs.
- Defeat the Super Nerd guarding the fossils.
- Choose Dome Fossil for Kabuto or Helix Fossil for Omanyte.
- 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.