Pokedex Randomizer

Phase 6 section

Pokemon Yellow Silph Co. Walkthrough

Silph Co. section for the Pokemon Yellow walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.

By Damodar Sharma Updated June 23, 2026 Walkthrough

Find the Card Key, clear the tower, beat the Rival and Giovanni, receive Lapras, and claim the Master Ball. This page is a standalone section for Phase 6: Marsh Badge, with source-backed Yellow encounter, trainer, item, hidden item, and boss data.

Source maps

Silph Co 1F, Silph Co 2F, Silph Co 3F, Silph Co 4F, Silph Co 5F, Silph Co 6F, Silph Co 7F, and Silph Co 8F, and 4 more map files.

Wild rows1 Trainers30 Items17

Route plan

Silph is the biggest trainer dungeon in Yellow. The 5F Card Key opens the locked doors; heal beds on 9F can reset a long clear.

Wild Pokemon

Area / subarea Game Method Pokemon Level Odds Condition / requirement
Silph Co 7FYellowGift Lapras Yellow sprite Lapras 15GiftSpeak to the Silph employee after the Rival fight.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Silph Co 2F (5, 12)Scientist trainer spriteScientistParty #2
Grimer Yellow sprite Grimer Lv. 26 Weezing Yellow sprite Weezing Lv. 26 Koffing Yellow sprite Koffing Lv. 26 Weezing Yellow sprite Weezing Lv. 26
$1,300One-time trainer; no rematch in Yellow.
2. Silph Co 2F (24, 13)Scientist trainer spriteScientistParty #3
Magnemite Yellow sprite Magnemite Lv. 28 Voltorb Yellow sprite Voltorb Lv. 28 Magneton Yellow sprite Magneton Lv. 28
$1,400One-time trainer; no rematch in Yellow.
3. Silph Co 2F (16, 11)Rocket trainer spriteRocketParty #23
Cubone Yellow sprite Cubone Lv. 29 Zubat Yellow sprite Zubat Lv. 29
$870One-time trainer; no rematch in Yellow.
4. Silph Co 2F (24, 7)Rocket trainer spriteRocketParty #24
Golbat Yellow sprite Golbat Lv. 25 Zubat Yellow sprite Zubat Lv. 25 Zubat Yellow sprite Zubat Lv. 25 Raticate Yellow sprite Raticate Lv. 25 Zubat Yellow sprite Zubat Lv. 25
$750One-time trainer; no rematch in Yellow.
5. Silph Co 3F (20, 7)Rocket trainer spriteRocketParty #25
Raticate Yellow sprite Raticate Lv. 28 Hypno Yellow sprite Hypno Lv. 28 Raticate Yellow sprite Raticate Lv. 28
$840One-time trainer; no rematch in Yellow.
6. Silph Co 3F (7, 9)Scientist trainer spriteScientistParty #4
Electrode Yellow sprite Electrode Lv. 29 Weezing Yellow sprite Weezing Lv. 29
$1,450One-time trainer; no rematch in Yellow.
7. Silph Co 4F (9, 14)Rocket trainer spriteRocketParty #26
Machop Yellow sprite Machop Lv. 29 Drowzee Yellow sprite Drowzee Lv. 29
$870One-time trainer; no rematch in Yellow.
8. Silph Co 4F (14, 6)Scientist trainer spriteScientistParty #5
Electrode Yellow sprite Electrode Lv. 33
$1,650One-time trainer; no rematch in Yellow.
9. Silph Co 4F (26, 10)Rocket trainer spriteRocketParty #27
Ekans Yellow sprite Ekans Lv. 28 Zubat Yellow sprite Zubat Lv. 28 Cubone Yellow sprite Cubone Lv. 28
$840One-time trainer; no rematch in Yellow.
10. Silph Co 5F (8, 16)Rocket trainer spriteRocketParty #28
Arbok Yellow sprite Arbok Lv. 33
$990One-time trainer; no rematch in Yellow.
11. Silph Co 5F (8, 3)Scientist trainer spriteScientistParty #6
Magneton Yellow sprite Magneton Lv. 26 Koffing Yellow sprite Koffing Lv. 26 Weezing Yellow sprite Weezing Lv. 26 Magnemite Yellow sprite Magnemite Lv. 26
$1,300One-time trainer; no rematch in Yellow.
12. Silph Co 5F (18, 10)Juggler trainer spriteJugglerParty #1
Kadabra Yellow sprite Kadabra Lv. 29 Mr. Mime Yellow sprite Mr. Mime Lv. 29
$1,015One-time trainer; no rematch in Yellow.
13. Silph Co 5F (28, 4)Rocket trainer spriteRocketParty #29
Hypno Yellow sprite Hypno Lv. 33
$990One-time trainer; no rematch in Yellow.
14. Silph Co 6F (17, 3)Rocket trainer spriteRocketParty #30
Machop Yellow sprite Machop Lv. 29 Machoke Yellow sprite Machoke Lv. 29
$870One-time trainer; no rematch in Yellow.
15. Silph Co 6F (7, 8)Scientist trainer spriteScientistParty #7
Voltorb Yellow sprite Voltorb Lv. 25 Koffing Yellow sprite Koffing Lv. 25 Magneton Yellow sprite Magneton Lv. 25 Magnemite Yellow sprite Magnemite Lv. 25 Koffing Yellow sprite Koffing Lv. 25
$1,250One-time trainer; no rematch in Yellow.
16. Silph Co 6F (14, 15)Rocket trainer spriteRocketParty #31
Zubat Yellow sprite Zubat Lv. 28 Zubat Yellow sprite Zubat Lv. 28 Golbat Yellow sprite Golbat Lv. 28
$840One-time trainer; no rematch in Yellow.
17. Silph Co 7F (13, 1)Rocket trainer spriteRocketParty #32
Raticate Yellow sprite Raticate Lv. 26 Arbok Yellow sprite Arbok Lv. 26 Koffing Yellow sprite Koffing Lv. 26 Golbat Yellow sprite Golbat Lv. 26
$780One-time trainer; no rematch in Yellow.
18. Silph Co 7F (2, 13)Scientist trainer spriteScientistParty #8
Electrode Yellow sprite Electrode Lv. 29 Muk Yellow sprite Muk Lv. 29
$1,450One-time trainer; no rematch in Yellow.
19. Silph Co 7F (20, 2)Rocket trainer spriteRocketParty #33
Cubone Yellow sprite Cubone Lv. 29 Cubone Yellow sprite Cubone Lv. 29
$870One-time trainer; no rematch in Yellow.
20. Silph Co 7F (19, 14)Rocket trainer spriteRocketParty #34
Sandshrew Yellow sprite Sandshrew Lv. 29 Sandslash Yellow sprite Sandslash Lv. 29
$870One-time trainer; no rematch in Yellow.
21. Silph Co 8F (19, 2)Rocket trainer spriteRocketParty #35
Raticate Yellow sprite Raticate Lv. 26 Zubat Yellow sprite Zubat Lv. 26 Golbat Yellow sprite Golbat Lv. 26 Rattata Yellow sprite Rattata Lv. 26
$780One-time trainer; no rematch in Yellow.
22. Silph Co 8F (10, 2)Scientist trainer spriteScientistParty #9
Grimer Yellow sprite Grimer Lv. 29 Electrode Yellow sprite Electrode Lv. 29
$1,450One-time trainer; no rematch in Yellow.
23. Silph Co 8F (12, 15)Rocket trainer spriteRocketParty #36
Weezing Yellow sprite Weezing Lv. 28 Golbat Yellow sprite Golbat Lv. 28 Koffing Yellow sprite Koffing Lv. 28
$840One-time trainer; no rematch in Yellow.
24. Silph Co 9F (2, 4)Rocket trainer spriteRocketParty #37
Drowzee Yellow sprite Drowzee Lv. 28 Grimer Yellow sprite Grimer Lv. 28 Machop Yellow sprite Machop Lv. 28
$840One-time trainer; no rematch in Yellow.
25. Silph Co 9F (21, 13)Scientist trainer spriteScientistParty #10
Voltorb Yellow sprite Voltorb Lv. 28 Koffing Yellow sprite Koffing Lv. 28 Magneton Yellow sprite Magneton Lv. 28
$1,400One-time trainer; no rematch in Yellow.
26. Silph Co 9F (13, 16)Rocket trainer spriteRocketParty #38
Golbat Yellow sprite Golbat Lv. 28 Drowzee Yellow sprite Drowzee Lv. 28 Hypno Yellow sprite Hypno Lv. 28
$840One-time trainer; no rematch in Yellow.
27. Silph Co 10F (1, 9)Rocket trainer spriteRocketParty #39
Machoke Yellow sprite Machoke Lv. 33
$990One-time trainer; no rematch in Yellow.
28. Silph Co 10F (10, 2)Scientist trainer spriteScientistParty #11
Magnemite Yellow sprite Magnemite Lv. 29 Koffing Yellow sprite Koffing Lv. 29
$1,450One-time trainer; no rematch in Yellow.
29. Silph Co 11F (6, 9)Giovanni trainer spriteGiovanniParty #2
Nidorino Yellow sprite Nidorino Lv. 37 Persian Yellow sprite Persian Lv. 35 Rhyhorn Yellow sprite Rhyhorn Lv. 37 Nidoqueen Yellow sprite Nidoqueen Lv. 41
$4,059One-time trainer; no rematch in Yellow.
30. Silph Co 11F (15, 9)Rocket trainer spriteRocketParty #40
Rattata Yellow sprite Rattata Lv. 25 Rattata Yellow sprite Rattata Lv. 25 Zubat Yellow sprite Zubat Lv. 25 Rattata Yellow sprite Rattata Lv. 25 Ekans Yellow sprite Ekans Lv. 25
$750One-time trainer; no rematch in Yellow.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
Hyper PotionVisible item ballVisible item ball at (8, 5) in Silph Co 3F.(8, 5)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Full HealVisible item ballVisible item ball at (3, 9) in Silph Co 4F.(3, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ReviveVisible item ballVisible item ball at (4, 7) in Silph Co 4F.(4, 7)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Escape RopeVisible item ballVisible item ball at (5, 8) in Silph Co 4F.(5, 8)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM09 Take DownVisible item ballVisible item ball at (2, 13) in Silph Co 5F.(2, 13)Reach this tile; HMs or story flags may be needed for late-game dungeons.
ProteinVisible item ballVisible item ball at (4, 6) in Silph Co 5F.(4, 6)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Card KeyVisible item ballVisible item ball at (21, 16) in Silph Co 5F.(21, 16)Reach this tile; HMs or story flags may be needed for late-game dungeons.
HP UpVisible item ballVisible item ball at (3, 12) in Silph Co 6F.(3, 12)Reach this tile; HMs or story flags may be needed for late-game dungeons.
X AccuracyVisible item ballVisible item ball at (2, 15) in Silph Co 6F.(2, 15)Reach this tile; HMs or story flags may be needed for late-game dungeons.
CalciumVisible item ballVisible item ball at (1, 9) in Silph Co 7F.(1, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM03 Swords DanceVisible item ballVisible item ball at (24, 11) in Silph Co 7F.(24, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM26 EarthquakeVisible item ballVisible item ball at (2, 12) in Silph Co 10F.(2, 12)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Rare CandyVisible item ballVisible item ball at (4, 14) in Silph Co 10F.(4, 14)Reach this tile; HMs or story flags may be needed for late-game dungeons.
CarbosVisible item ballVisible item ball at (5, 11) in Silph Co 10F.(5, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
ElixerHidden itemHidden on the searchable tile at (12, 3) in Silph Co 5F.(12, 3)Press A on the hidden tile or use the Itemfinder nearby.
Max PotionHidden itemHidden on the searchable tile at (2, 15) in Silph Co 9F.(2, 15)Press A on the hidden tile or use the Itemfinder nearby.
Master BallKey rewardDefeat Giovanni in Silph Co. and talk to the president.-Defeat Giovanni in Silph Co. and talk to the president.

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Rival trainer spriteRivalSilph Co. 7F Rival - Jolteon branch
Sandslash Yellow sprite Sandslash Lv. 38 Ninetales Yellow sprite Ninetales Lv. 35 Cloyster Yellow sprite Cloyster Lv. 37 Kadabra Yellow sprite Kadabra Lv. 35 Jolteon Yellow sprite Jolteon Lv. 40
$2,600The level 40 Eevee evolution is the main wall before Giovanni.Win Oak's Lab and win the optional first Route 22 Rival battle. The branch changes Eevee's final evolution and the Rival's coverage slots; keep Ground for Jolteon, Water/Ground/Rock for Flareon, and Electric/Grass for Vaporeon.
Rival trainer spriteRivalSilph Co. 7F Rival - Flareon branch
Sandslash Yellow sprite Sandslash Lv. 38 Cloyster Yellow sprite Cloyster Lv. 35 Magneton Yellow sprite Magneton Lv. 37 Kadabra Yellow sprite Kadabra Lv. 35 Flareon Yellow sprite Flareon Lv. 40
$2,600The level 40 Eevee evolution is the main wall before Giovanni.Win Oak's Lab and skip or lose the optional first Route 22 Rival battle. The branch changes Eevee's final evolution and the Rival's coverage slots; keep Ground for Jolteon, Water/Ground/Rock for Flareon, and Electric/Grass for Vaporeon.
Rival trainer spriteRivalSilph Co. 7F Rival - Vaporeon branch
Sandslash Yellow sprite Sandslash Lv. 38 Magneton Yellow sprite Magneton Lv. 35 Ninetales Yellow sprite Ninetales Lv. 37 Kadabra Yellow sprite Kadabra Lv. 35 Vaporeon Yellow sprite Vaporeon Lv. 40
$2,600The level 40 Eevee evolution is the main wall before Giovanni.Lose the Oak's Lab Rival battle. The branch changes Eevee's final evolution and the Rival's coverage slots; keep Ground for Jolteon, Water/Ground/Rock for Flareon, and Electric/Grass for Vaporeon.
Jessie and James trainer spriteJessie and JamesJessie and James - Silph Co. 11F
Weezing Yellow sprite Weezing Lv. 31 Arbok Yellow sprite Arbok Lv. 31 Meowth Yellow sprite Meowth Lv. 31
$930Weezing, Arbok, and Meowth fight immediately before the final Silph push.Heal after the Rival, use Psychic/Ground pressure, and keep a fresh answer for Giovanni afterward.
Giovanni trainer spriteGiovanniGiovanni - Silph Co.
Nidorino Yellow sprite Nidorino Lv. 37 Persian Yellow sprite Persian Lv. 35 Rhyhorn Yellow sprite Rhyhorn Lv. 37 Nidoqueen Yellow sprite Nidoqueen Lv. 41
$4,059Nidoqueen and Kangaskhan turn this into a real boss fight after the Rival.Water/Ice coverage and Psychic attacks help. Heal after the Rival before triggering Giovanni.

Completion Checklist

  • Get Card Key on 5F.
  • Rescue Lapras on 7F.
  • Defeat Rival and Giovanni.
  • Receive Master Ball from the president.
  • 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.

Related articles

Pokemon Yellow Walkthrough HubPhase 6: Marsh BadgePrevious: Saffron City and Fighting DojoNext: Saffron Gym