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Pokemon Red and Blue Power Plant, Route 21, and Viridian Gym Walkthrough

Earth Badge

Power Plant, Route 21, and Viridian Gym section for the Pokemon Red and Blue walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.

By Damodar Sharma Updated June 19, 2026 Walkthrough

Optional Zapdos and Power Plant loot, Surf north/south Route 21, then defeat Giovanni in the reopened Viridian Gym. This page is a standalone section for Phase 8: Earth Badge, with source-backed Red/Blue encounter, trainer, item, hidden item, and boss data.

Source maps

Power Plant, Route 21, and Viridian Gym.

Wild rows29 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

Version

Each area below has its own table, split by encounter method. Red/Blue has no time-of-day mechanic, so every method uses a single rate column, and the R/B chips show which version each row applies to. Tall grass, cave, and Surf rates merge every base slot for a species out of the Gen I ten-slot table: 51/256, 51/256, 39/256, 25/256, 25/256, 25/256, 13/256, 13/256, 11/256, and 3/256. Fishing, gift, trade, prize, and static rows keep their own labeled rates.

Power Plant

Power Plant wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Voltorb Red and Blue sprite Voltorb RB21-2330%—
Magnemite Red and Blue sprite Magnemite RB21-2330%—
Pikachu Red and Blue sprite Pikachu RB20-2425%—
Magneton Red and Blue sprite Magneton RB32-3510%—
Electabuzz Red and Blue sprite Electabuzz RB33-365.5%—
Raichu Red and Blue sprite Raichu RB33-365.5%—
Static item-ball Pokemon
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Electrode Red and Blue sprite Electrode RB43StaticLooks like an item ball before battle.
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Electrode Red and Blue sprite Electrode RB43StaticLooks like an item ball before battle.
Voltorb Red and Blue sprite Voltorb RB40StaticLooks like an item ball before battle.
Static Pokemon
Zapdos Red and Blue sprite Zapdos RB50StaticInteract with the overworld Pokemon.
Static legendary
Zapdos Red and Blue sprite Zapdos RB50StaticInteract with Zapdos at the back of Power Plant.

Route 21

Route 21 wild Pokémon by method, games, levels, encounter rate, and requirements
PokémonGamesLevelsRateNotes
Tall grass / cave floor
Rattata Red and Blue sprite Rattata RB21-2330%—
Pidgey Red and Blue sprite Pidgey RB21-2330%—
Raticate Red and Blue sprite Raticate RB3015%—
Pidgeotto Red and Blue sprite Pidgeotto RB30-3215%—
Tangela Red and Blue sprite Tangela RB28-3211%—
Surf
Tentacool Red and Blue sprite Tentacool RB5-40100%—
Fishing — Old Rod
Magikarp Red and Blue sprite Magikarp RB5100%Any fishable water tile.
Fishing — Good Rod
Goldeen Red and Blue sprite Goldeen RB1050%Any fishable water tile after getting Good Rod.
Poliwag Red and Blue sprite Poliwag RB1050%Any fishable water tile after getting Good Rod.
Fishing — Super Rod
Staryu Red and Blue sprite Staryu RB1525%Super Rod group 8.
Horsea Red and Blue sprite Horsea RB1525%Super Rod group 8.
Shellder Red and Blue sprite Shellder RB1525%Super Rod group 8.
Goldeen Red and Blue sprite Goldeen RB1525%Super Rod group 8.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Route 21 (4, 24)Fisherman trainer spriteFishermanParty #7
Seaking Red and Blue sprite Seaking Lv. 28 Goldeen Red and Blue sprite Goldeen Lv. 28 Seaking Red and Blue sprite Seaking Lv. 28 Seaking Red and Blue sprite Seaking Lv. 28
$980One-time trainer; no rematch in Red/Blue.
2. Route 21 (6, 25)Fisherman trainer spriteFishermanParty #9
Magikarp Red and Blue sprite Magikarp Lv. 27 Magikarp Red and Blue sprite Magikarp Lv. 27 Magikarp Red and Blue sprite Magikarp Lv. 27 Magikarp Red and Blue sprite Magikarp Lv. 27 Magikarp Red and Blue sprite Magikarp Lv. 27 Magikarp Red and Blue sprite Magikarp Lv. 27
$945One-time trainer; no rematch in Red/Blue.
3. Route 21 (10, 31)Swimmer trainer spriteSwimmerParty #12
Seadra Red and Blue sprite Seadra Lv. 33 Tentacruel Red and Blue sprite Tentacruel Lv. 33
$165One-time trainer; no rematch in Red/Blue.
4. Route 21 (12, 30)Cue Ball trainer spriteCue BallParty #9
Tentacool Red and Blue sprite Tentacool Lv. 31 Tentacool Red and Blue sprite Tentacool Lv. 31 Tentacruel Red and Blue sprite Tentacruel Lv. 31
$775One-time trainer; no rematch in Red/Blue.
5. Route 21 (16, 63)Swimmer trainer spriteSwimmerParty #13
Starmie Red and Blue sprite Starmie Lv. 37
$185One-time trainer; no rematch in Red/Blue.
6. Route 21 (5, 71)Swimmer trainer spriteSwimmerParty #14
Staryu Red and Blue sprite Staryu Lv. 33 Wartortle Red and Blue sprite Wartortle Lv. 33
$165One-time trainer; no rematch in Red/Blue.
7. Route 21 (15, 71)Swimmer trainer spriteSwimmerParty #15
Poliwhirl Red and Blue sprite Poliwhirl Lv. 32 Tentacool Red and Blue sprite Tentacool Lv. 32 Seadra Red and Blue sprite Seadra Lv. 32
$160One-time trainer; no rematch in Red/Blue.
8. Route 21 (14, 56)Fisherman trainer spriteFishermanParty #8
Shellder Red and Blue sprite Shellder Lv. 31 Cloyster Red and Blue sprite Cloyster Lv. 31
$1,085One-time trainer; no rematch in Red/Blue.
9. Route 21 (17, 57)Fisherman trainer spriteFishermanParty #10
Seaking Red and Blue sprite Seaking Lv. 33 Goldeen Red and Blue sprite Goldeen Lv. 33
$1,155One-time trainer; no rematch in Red/Blue.
10. Viridian Gym (2, 1)Giovanni trainer spriteGiovanniParty #3
Rhyhorn Red and Blue sprite Rhyhorn Lv. 45 Dugtrio Red and Blue sprite Dugtrio Lv. 42 Nidoqueen Red and Blue sprite Nidoqueen Lv. 44 Nidoking Red and Blue sprite Nidoking Lv. 45 Rhydon Red and Blue sprite Rhydon Lv. 50
$4,950One-time trainer; no rematch in Red/Blue.
11. Viridian Gym (12, 7)Cooltrainer M trainer spriteCooltrainer MParty #9
Sandslash Red and Blue sprite Sandslash Lv. 39 Dugtrio Red and Blue sprite Dugtrio Lv. 39
$1,365One-time trainer; no rematch in Red/Blue.
12. Viridian Gym (11, 11)Blackbelt trainer spriteBlackbeltParty #6
Machop Red and Blue sprite Machop Lv. 40 Machoke Red and Blue sprite Machoke Lv. 40
$1,000One-time trainer; no rematch in Red/Blue.
13. Viridian Gym (10, 7)Tamer trainer spriteTamerParty #3
Rhyhorn Red and Blue sprite Rhyhorn Lv. 43
$1,720One-time trainer; no rematch in Red/Blue.
14. Viridian Gym (3, 7)Blackbelt trainer spriteBlackbeltParty #7
Machoke Red and Blue sprite Machoke Lv. 43
$1,075One-time trainer; no rematch in Red/Blue.
15. Viridian Gym (13, 5)Cooltrainer M trainer spriteCooltrainer MParty #10
Rhyhorn Red and Blue sprite Rhyhorn Lv. 43
$1,505One-time trainer; no rematch in Red/Blue.
16. Viridian Gym (10, 1)Blackbelt trainer spriteBlackbeltParty #8
Machoke Red and Blue sprite Machoke Lv. 38 Machop Red and Blue sprite Machop Lv. 38 Machoke Red and Blue sprite Machoke Lv. 38
$950One-time trainer; no rematch in Red/Blue.
17. Viridian Gym (2, 16)Tamer trainer spriteTamerParty #4
Arbok Red and Blue sprite Arbok Lv. 39 Tauros Red and Blue sprite Tauros Lv. 39
$1,560One-time trainer; no rematch in Red/Blue.
18. Viridian Gym (6, 5)Cooltrainer M trainer spriteCooltrainer MParty #1
Nidorino Red and Blue sprite Nidorino Lv. 39 Nidoking Red and Blue sprite Nidoking Lv. 39
$1,365One-time trainer; no rematch in Red/Blue.

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
Rhyhorn Red and Blue sprite Rhyhorn Lv. 45 Dugtrio Red and Blue sprite Dugtrio Lv. 42 Nidoqueen Red and Blue sprite Nidoqueen Lv. 44 Nidoking Red and Blue sprite Nidoking Lv. 45 Rhydon Red and Blue sprite Rhydon Lv. 50
$4,950Rhydon 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.
  • Verify the wild table's version splits 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/pokered: 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.
  • Red/Blue has no day/night encounter column; tables group each area by encounter method with R/B game chips and a single merged Rate column.

Related articles

Pokemon Red and Blue Walkthrough HubPhase 8: Earth BadgePrevious: Cinnabar GymNext: Route 23 and Victory Road