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Pokemon Yellow Phase 8: Earth Badge Walkthrough

Phase 8 of the Pokemon Yellow walkthrough covering Power Plant, Route 21, Viridian Gym, final Giovanni, and Route 23 setup.

By Damodar Sharma Updated June 23, 2026 Walkthrough

Power Plant, Route 21, Viridian Gym, final Giovanni, and Route 23 setup.

Phase 8

Target47-50 RewardEarth Badge, TM27 Fissure, Zapdos, Victory Road access Sections1
Charizard Yellow sprite Blastoise Yellow sprite

Phase Sections

01
Power Plant, Route 21, and Viridian Gym

Phase Data Rollup

Section Source maps Wild rows Trainers Items
Power Plant, Route 21, and Viridian Gym326189

Power Plant, Route 21, and Viridian Gym

Optional Zapdos and Power Plant loot, Surf north/south Route 21, then defeat Giovanni in the reopened Viridian Gym.

Source maps

Power Plant, Route 21, and Viridian Gym.

Wild rows26 Trainers18 Items9

Route plan

Power Plant is optional but important for completion and Electric catches. Viridian Gym is Ground-type heavy and rewards Water/Grass coverage.

Wild Pokemon

Power Plant

Power Plant wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
Tall grass / cave floor
Magnemite Yellow sprite Magnemite 30-3540%—
Magneton Yellow sprite Magneton 33-3820%—
Voltorb Yellow sprite Voltorb 33-3720%—
Grimer Yellow sprite Grimer 33-3715%—
Muk Yellow sprite Muk 33-375.5%—
Static item-ball Pokemon
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Electrode Yellow sprite Electrode 43StaticLooks like an item ball before battle.
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Electrode Yellow sprite Electrode 43StaticLooks like an item ball before battle.
Voltorb Yellow sprite Voltorb 40StaticLooks like an item ball before battle.
Static Pokemon
Zapdos Yellow sprite Zapdos 50StaticInteract with the overworld Pokemon.

Route 21

Route 21 wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
Tall grass / cave floor
Pidgey Yellow sprite Pidgey 11-1755%—
Rattata Yellow sprite Rattata 13-1530%—
Pidgeotto Yellow sprite Pidgeotto 15-1911%—
Raticate Yellow sprite Raticate 155.1%—
Surfing
Tentacool Yellow sprite Tentacool 5-40100%—
Fishing — Old Rod
Magikarp Yellow sprite Magikarp 5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Yellow sprite Goldeen 1050%Any fishable water tile after getting Good Rod.
Poliwag Yellow sprite Poliwag 1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Tentacool Yellow sprite Tentacool 1525%Yellow Super Rod slot table.
Staryu Yellow sprite Staryu 2025%Yellow Super Rod slot table.
Tentacool Yellow sprite Tentacool 3025%Yellow Super Rod slot table.
Tentacruel Yellow sprite Tentacruel 3025%Yellow Super Rod slot table.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Route 21 (4, 24)Fisherman trainer spriteFishermanParty #7
Seaking Yellow sprite Seaking Lv. 28 Goldeen Yellow sprite Goldeen Lv. 28 Seaking Yellow sprite Seaking Lv. 28 Seaking Yellow sprite Seaking Lv. 28
$980One-time trainer; no rematch in Yellow.
2. Route 21 (6, 25)Fisherman trainer spriteFishermanParty #9
Magikarp Yellow sprite Magikarp Lv. 27 Magikarp Yellow sprite Magikarp Lv. 27 Magikarp Yellow sprite Magikarp Lv. 27 Magikarp Yellow sprite Magikarp Lv. 27 Magikarp Yellow sprite Magikarp Lv. 27 Magikarp Yellow sprite Magikarp Lv. 27
$945One-time trainer; no rematch in Yellow.
3. Route 21 (10, 31)Swimmer trainer spriteSwimmerParty #12
Seadra Yellow sprite Seadra Lv. 33 Tentacruel Yellow sprite Tentacruel Lv. 33
$165One-time trainer; no rematch in Yellow.
4. Route 21 (12, 30)Cue Ball trainer spriteCue BallParty #9
Tentacool Yellow sprite Tentacool Lv. 31 Tentacool Yellow sprite Tentacool Lv. 31 Tentacruel Yellow sprite Tentacruel Lv. 31
$775One-time trainer; no rematch in Yellow.
5. Route 21 (16, 63)Swimmer trainer spriteSwimmerParty #13
Starmie Yellow sprite Starmie Lv. 37
$185One-time trainer; no rematch in Yellow.
6. Route 21 (5, 71)Swimmer trainer spriteSwimmerParty #14
Staryu Yellow sprite Staryu Lv. 33 Wartortle Yellow sprite Wartortle Lv. 33
$165One-time trainer; no rematch in Yellow.
7. Route 21 (15, 71)Swimmer trainer spriteSwimmerParty #15
Poliwhirl Yellow sprite Poliwhirl Lv. 32 Tentacool Yellow sprite Tentacool Lv. 32 Seadra Yellow sprite Seadra Lv. 32
$160One-time trainer; no rematch in Yellow.
8. Route 21 (14, 56)Fisherman trainer spriteFishermanParty #8
Shellder Yellow sprite Shellder Lv. 31 Cloyster Yellow sprite Cloyster Lv. 31
$1,085One-time trainer; no rematch in Yellow.
9. Route 21 (17, 57)Fisherman trainer spriteFishermanParty #10
Seaking Yellow sprite Seaking Lv. 33 Goldeen Yellow sprite Goldeen Lv. 33
$1,155One-time trainer; no rematch in Yellow.
10. Viridian Gym (2, 1)Giovanni trainer spriteGiovanniParty #3
Dugtrio Yellow sprite Dugtrio Lv. 50 Persian Yellow sprite Persian Lv. 53 Nidoqueen Yellow sprite Nidoqueen Lv. 53 Nidoking Yellow sprite Nidoking Lv. 55 Rhydon Yellow sprite Rhydon Lv. 55
$5,445One-time trainer; no rematch in Yellow.
11. Viridian Gym (12, 7)Cooltrainer M trainer spriteCooltrainer MParty #9
Sandslash Yellow sprite Sandslash Lv. 39 Dugtrio Yellow sprite Dugtrio Lv. 39
$1,365One-time trainer; no rematch in Yellow.
12. Viridian Gym (11, 11)Blackbelt trainer spriteBlackbeltParty #6
Machop Yellow sprite Machop Lv. 40 Machoke Yellow sprite Machoke Lv. 40
$1,000One-time trainer; no rematch in Yellow.
13. Viridian Gym (10, 7)Tamer trainer spriteTamerParty #3
Rhyhorn Yellow sprite Rhyhorn Lv. 43
$1,720One-time trainer; no rematch in Yellow.
14. Viridian Gym (3, 7)Blackbelt trainer spriteBlackbeltParty #7
Machoke Yellow sprite Machoke Lv. 43
$1,075One-time trainer; no rematch in Yellow.
15. Viridian Gym (13, 5)Cooltrainer M trainer spriteCooltrainer MParty #10
Rhyhorn Yellow sprite Rhyhorn Lv. 43
$1,505One-time trainer; no rematch in Yellow.
16. Viridian Gym (10, 1)Blackbelt trainer spriteBlackbeltParty #8
Machoke Yellow sprite Machoke Lv. 38 Machop Yellow sprite Machop Lv. 38 Machoke Yellow sprite Machoke Lv. 38
$950One-time trainer; no rematch in Yellow.
17. Viridian Gym (2, 16)Tamer trainer spriteTamerParty #4
Arbok Yellow sprite Arbok Lv. 39 Tauros Yellow sprite Tauros Lv. 39
$1,560One-time trainer; no rematch in Yellow.
18. Viridian Gym (6, 5)Cooltrainer M trainer spriteCooltrainer MParty #1
Nidorino Yellow sprite Nidorino Lv. 39 Nidoking Yellow sprite Nidoking Lv. 39
$1,365One-time trainer; no rematch in Yellow.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
CarbosVisible item ballVisible item ball at (7, 25) in Power Plant.(7, 25)Reach this tile; HMs or story flags may be needed for late-game dungeons.
HP UpVisible item ballVisible item ball at (28, 3) in Power Plant.(28, 3)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Rare CandyVisible item ballVisible item ball at (34, 3) in Power Plant.(34, 3)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM25 ThunderVisible item ballVisible item ball at (26, 32) in Power Plant.(26, 32)Reach this tile; HMs or story flags may be needed for late-game dungeons.
TM33 ReflectVisible item ballVisible item ball at (20, 32) in Power Plant.(20, 32)Reach this tile; HMs or story flags may be needed for late-game dungeons.
ReviveVisible item ballVisible item ball at (16, 9) in Viridian Gym.(16, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ElixerHidden itemHidden on the searchable tile at (17, 16) in Power Plant.(17, 16)Press A on the hidden tile or use the Itemfinder nearby.
PP UpHidden itemHidden on the searchable tile at (12, 1) in Power Plant.(12, 1)Press A on the hidden tile or use the Itemfinder nearby.
TM27 FissureGym rewardDefeat Giovanni for the Earth Badge.-Defeat Giovanni for the Earth Badge.

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Giovanni trainer spriteGiovanniGiovanni - Viridian Gym
Dugtrio Yellow sprite Dugtrio Lv. 50 Persian Yellow sprite Persian Lv. 53 Nidoqueen Yellow sprite Nidoqueen Lv. 53 Nidoking Yellow sprite Nidoking Lv. 55 Rhydon Yellow sprite Rhydon Lv. 55
$5,445Rhydon is level 50 and the badge gate before Victory Road.Surf, Razor Leaf, Ice Beam, and strong Water/Grass coverage sweep. Watch Dugtrio's Speed if you bring frail Electric or Fire Pokemon.

Completion Checklist

  • Catch Zapdos if desired.
  • Clear Route 21 trainers/wilds.
  • Defeat Giovanni for Earth Badge.

Sources

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