Pokedex Randomizer

Phase 2 section

Pokemon FireRed and LeafGreen Route 3 and Mt. Moon Walkthrough

Route 3 and Mt. Moon section for the FireRed and LeafGreen walkthrough with source-backed wild Pokemon, trainers, items, hidden items, bosses, and route notes.

By Damodar Sharma Updated June 24, 2026 Walkthrough

Clear Route 3, buy or skip the Route 4 Magikarp, cross Mt. Moon, and choose the Helix or Dome Fossil. This page is a standalone section for Phase 2: Cascade Badge, with FireRed/LeafGreen source data for encounters, trainers, items, hidden items, and boss routing.

Source maps

Route 3, Route 4, Route 4 Pokemon Center 1F, Mt. Moon 1F, Mt. Moon B1F, and Mt. Moon B2F.

Wild rows35 Trainers21 Items25

Route plan

Bring Repels if you want a faster cave. Save before the fossil Super Nerd if you care about clean routing.

Route Notes

  • Fossils revive on Cinnabar at Lv. 5. Helix becomes Omanyte; Dome becomes Kabuto.

Wild Pokemon

Version

Each area below has its own table, split by encounter method. Standard wild rows merge every slot for a species into one line with a combined rate, and FireRed/LeafGreen exclusives are marked with FR/LG game chips; there is no time-of-day split in these remakes. Underlying slot odds: grass and cave 20/20/10/10/10/10/5/5/4/4/1/1; Surf and Rock Smash 60/30/5/4/1; Old Rod 70/30; Good Rod 60/20/20; Super Rod 40/40/15/4/1. Gift, static, trade, and prize Pokemon keep their own labeled rows.

Mt. Moon 1F

Mt. Moon 1F wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Grass / cave floor
Zubat FireRed and LeafGreen sprite Zubat FRLG7-1065%—
Geodude FireRed and LeafGreen sprite Geodude FRLG7-925%—
Paras FireRed and LeafGreen sprite Paras FRLG85%—
Clefairy FireRed and LeafGreen sprite Clefairy FRLG81%—

Mt. Moon B1F

Mt. Moon B1F wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Grass / cave floor
Paras FireRed and LeafGreen sprite Paras FRLG5-10100%—

Mt. Moon B2F

Mt. Moon B2F wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Grass / cave floor
Zubat FireRed and LeafGreen sprite Zubat FRLG8-1145%—
Geodude FireRed and LeafGreen sprite Geodude FRLG9-1030%—
Paras FireRed and LeafGreen sprite Paras FRLG10 or 1215%—
Clefairy FireRed and LeafGreen sprite Clefairy FRLG10 or 126%—

Route 3

Route 3 wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Grass / cave floor
Spearow FireRed and LeafGreen sprite Spearow FRLG6-835%—
Pidgey FireRed and LeafGreen sprite Pidgey FRLG6-730%—
Nidoran F FireRed and LeafGreen sprite Nidoran F FRLG6-714%—
Nidoran M FireRed and LeafGreen sprite Nidoran M FRLG6-714%—
Jigglypuff FireRed and LeafGreen sprite Jigglypuff FRLG3 or 5 or 710%—
Mankey FireRed and LeafGreen sprite Mankey FRLG710%—
Nidoran F FireRed and LeafGreen sprite Nidoran F FRLG61%—
Nidoran M FireRed and LeafGreen sprite Nidoran M FRLG61%—

Route 4

Route 4 wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Grass / cave floor
Rattata FireRed and LeafGreen sprite Rattata FRLG8 or 10 or 1235%—
Spearow FireRed and LeafGreen sprite Spearow FRLG8 or 10 or 1235%—
Ekans FireRed and LeafGreen sprite Ekans FRLG6 or 8 or 10 or 1225%—
Sandshrew FireRed and LeafGreen sprite Sandshrew FRLG6 or 8 or 10 or 1225%—
Mankey FireRed and LeafGreen sprite Mankey FRLG10 or 125%—
Surfing
Tentacool FireRed and LeafGreen sprite Tentacool FRLG5-40100%—
Fishing — Old Rod
Magikarp FireRed and LeafGreen sprite Magikarp FRLG5100%—
Fishing — Good Rod
Horsea FireRed and LeafGreen sprite Horsea FRLG5-1560%—
Krabby FireRed and LeafGreen sprite Krabby FRLG5-1560%—
Horsea FireRed and LeafGreen sprite Horsea FRLG5-1520%—
Krabby FireRed and LeafGreen sprite Krabby FRLG5-1520%—
Magikarp FireRed and LeafGreen sprite Magikarp FRLG5-1520%—
Fishing — Super Rod
Horsea FireRed and LeafGreen sprite Horsea FRLG15-3544%—
Krabby FireRed and LeafGreen sprite Krabby FRLG15-3544%—
Gyarados FireRed and LeafGreen sprite Gyarados FRLG15-2515%—
Psyduck FireRed and LeafGreen sprite Psyduck FRLG25-351%—
Slowpoke FireRed and LeafGreen sprite Slowpoke FRLG25-351%—

Route 4 Pokemon Center 1F

Route 4 Pokemon Center 1F wild Pokemon by method, games, levels, encounter rates, and requirements
PokémonGamesLevelsRateNotes
Gift Pokémon
Magikarp FireRed and LeafGreen sprite Magikarp FRLG5GiftReceive from Route 4 Pokemon Center 1F.

Trainers

TrainerArea / positionTeamRewardNotes
Lass Robin trainer spriteRobinLassRoute 3
Jigglypuff FireRed and LeafGreen sprite Jigglypuff Lv. 14
$224VS Seeker/rematch-capable. Map tile (40, 11); sight 3.
Bug Catcher James trainer spriteJamesBug CatcherRoute 3
Caterpie FireRed and LeafGreen sprite Caterpie Lv. 11 Metapod FireRed and LeafGreen sprite Metapod Lv. 11
$132VS Seeker/rematch-capable. Map tile (32, 6); sight 4.
Lass Sally trainer spriteSallyLassRoute 3
Rattata FireRed and LeafGreen sprite Rattata Lv. 10 Nidoran F FireRed and LeafGreen sprite Nidoran F Lv. 10
$160VS Seeker/rematch-capable. Map tile (30, 3); sight 5.
Bug Catcher Greg trainer spriteGregBug CatcherRoute 3
Weedle FireRed and LeafGreen sprite Weedle Lv. 9 Kakuna FireRed and LeafGreen sprite Kakuna Lv. 9 Caterpie FireRed and LeafGreen sprite Caterpie Lv. 9 Metapod FireRed and LeafGreen sprite Metapod Lv. 9
$108VS Seeker/rematch-capable. Map tile (25, 4); sight 2.
Youngster Calvin trainer spriteCalvinYoungsterRoute 3
Spearow FireRed and LeafGreen sprite Spearow Lv. 14
$224VS Seeker/rematch-capable. Map tile (29, 10); sight 5.
Lass Janice trainer spriteJaniceLassRoute 3
Pidgey FireRed and LeafGreen sprite Pidgey Lv. 9 Pidgey FireRed and LeafGreen sprite Pidgey Lv. 9
$144VS Seeker/rematch-capable. Map tile (19, 9); sight 5.
Bug Catcher Colton trainer spriteColtonBug CatcherRoute 3
Caterpie FireRed and LeafGreen sprite Caterpie Lv. 10 Weedle FireRed and LeafGreen sprite Weedle Lv. 10 Caterpie FireRed and LeafGreen sprite Caterpie Lv. 10
$120VS Seeker/rematch-capable. Map tile (12, 6); sight 3.
Youngster Ben trainer spriteBenYoungsterRoute 3
Rattata FireRed and LeafGreen sprite Rattata Lv. 11 Ekans FireRed and LeafGreen sprite Ekans Lv. 11
$176VS Seeker/rematch-capable. Map tile (17, 4); sight 2.
Lass Crissy trainer spriteCrissyLassRoute 4
Paras FireRed and LeafGreen sprite Paras Lv. 31 Paras FireRed and LeafGreen sprite Paras Lv. 31 Parasect FireRed and LeafGreen sprite Parasect Lv. 31
$496VS Seeker/rematch-capable. Map tile (75, 3); sight 4.
Lass Iris trainer spriteIrisLassMt. Moon 1F
Clefairy FireRed and LeafGreen sprite Clefairy Lv. 14
$224One-time or scripted battle. Map tile (20, 26); sight 2.
Bug Catcher Robby trainer spriteRobbyBug CatcherMt. Moon 1F
Caterpie FireRed and LeafGreen sprite Caterpie Lv. 10 Metapod FireRed and LeafGreen sprite Metapod Lv. 10 Caterpie FireRed and LeafGreen sprite Caterpie Lv. 10
$120One-time or scripted battle. Map tile (36, 30); sight 2.
Super Nerd Jovan trainer spriteJovanSuper NerdMt. Moon 1F
Magnemite FireRed and LeafGreen sprite Magnemite Lv. 11 Voltorb FireRed and LeafGreen sprite Voltorb Lv. 11
$264One-time or scripted battle. Map tile (30, 35); sight 4.
Lass Miriam trainer spriteMiriamLassMt. Moon 1F
Oddish FireRed and LeafGreen sprite Oddish Lv. 11 Bellsprout FireRed and LeafGreen sprite Bellsprout Lv. 11
$176One-time or scripted battle. Map tile (33, 4); sight 2.
Bug Catcher Kent trainer spriteKentBug CatcherMt. Moon 1F
Weedle FireRed and LeafGreen sprite Weedle Lv. 11 Kakuna FireRed and LeafGreen sprite Kakuna Lv. 11
$132One-time or scripted battle. Map tile (7, 26); sight 4.
Youngster Josh trainer spriteJoshYoungsterMt. Moon 1F
Rattata FireRed and LeafGreen sprite Rattata Lv. 10 Rattata FireRed and LeafGreen sprite Rattata Lv. 10 Zubat FireRed and LeafGreen sprite Zubat Lv. 10
$160One-time or scripted battle. Map tile (13, 17); sight 4.
Hiker Marcos trainer spriteMarcosHikerMt. Moon 1F
Geodude FireRed and LeafGreen sprite Geodude Lv. 10 Geodude FireRed and LeafGreen sprite Geodude Lv. 10 Onix FireRed and LeafGreen sprite Onix Lv. 10
$360One-time or scripted battle. Map tile (7, 10); sight 1.
Team Rocket Grunt trainer spriteGruntTeam RocketMt. Moon B2F
Rattata FireRed and LeafGreen sprite Rattata Lv. 13 Sandshrew FireRed and LeafGreen sprite Sandshrew Lv. 13
$416One-time or scripted battle. Map tile (37, 21); sight 3.
Team Rocket Grunt trainer spriteGruntTeam RocketMt. Moon B2F
Rattata FireRed and LeafGreen sprite Rattata Lv. 13 Zubat FireRed and LeafGreen sprite Zubat Lv. 13
$416One-time or scripted battle. Map tile (12, 20); sight 2.
Team Rocket Grunt trainer spriteGruntTeam RocketMt. Moon B2F
Zubat FireRed and LeafGreen sprite Zubat Lv. 11 Ekans FireRed and LeafGreen sprite Ekans Lv. 11
$352One-time or scripted battle. Map tile (35, 12); sight 4.
Team Rocket Grunt trainer spriteGruntTeam RocketMt. Moon B2F
Sandshrew FireRed and LeafGreen sprite Sandshrew Lv. 11 Rattata FireRed and LeafGreen sprite Rattata Lv. 11 Zubat FireRed and LeafGreen sprite Zubat Lv. 11
$352One-time or scripted battle. Map tile (18, 27); sight 4.
Super Nerd Miguel trainer spriteMiguelSuper NerdMt. Moon B2F
Grimer FireRed and LeafGreen sprite Grimer Lv. 12 Voltorb FireRed and LeafGreen sprite Voltorb Lv. 12 Koffing FireRed and LeafGreen sprite Koffing Lv. 12
$288One-time or scripted battle. Scripted map battle.

Items And Hidden Items

ItemTypeArea / directionCoordinateRequirement
Escape RopeVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (44, 21).44, 21HIDE MT MOON 1F ESCAPE ROPE
Moon StoneVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (3, 2).3, 2HIDE MT MOON 1F MOON STONE
Paralyze HealVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (2, 22).2, 22HIDE MT MOON 1F PARALYZE HEAL
PotionVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (26, 32).26, 32HIDE MT MOON 1F POTION
Rare CandyVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (42, 35).42, 35HIDE MT MOON 1F RARE CANDY
TM09 Bullet SeedVisible item ballMt. Moon 1F: Visible item ball in Mt. Moon 1F; check around tile (11, 35).11, 35HIDE MT MOON 1F TM09
Big MushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (24, 35).24, 35Use the Itemfinder or check the described tile.
Big MushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (6, 12).6, 12Use the Itemfinder or check the described tile.
Big MushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (25, 34).25, 34Use the Itemfinder or check the described tile.
TinymushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (46, 2).46, 2Use the Itemfinder or check the described tile.
TinymushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (26, 2).26, 2Use the Itemfinder or check the described tile.
TinymushroomHidden itemMt. Moon B1F: Hidden in Mt. Moon B1F; press A on the tile around (39, 34).39, 34Use the Itemfinder or check the described tile.
AntidoteVisible item ballMt. Moon B2F: Visible item ball in Mt. Moon B2F; check around tile (3, 11).3, 11HIDE MT MOON B2F ANTIDOTE
Dome FossilGift/scriptedMt. Moon B2F: Scripted reward from Event Script Dome Fossil.-Scripted reward from Event Script Dome Fossil.
EtherHidden itemMt. Moon B2F: Hidden in Mt. Moon B2F; press A on the tile around (39, 11).39, 11Use the Itemfinder or check the described tile.
Helix FossilGift/scriptedMt. Moon B2F: Scripted reward from Event Script Helix Fossil.-Scripted reward from Event Script Helix Fossil.
Moon StoneHidden itemMt. Moon B2F: Hidden in Mt. Moon B2F; press A on the tile around (20, 16).20, 16Use the Itemfinder or check the described tile.
ReviveVisible item ballMt. Moon B2F: Visible item ball in Mt. Moon B2F; check around tile (24, 6).24, 6HIDE MT MOON B2F REVIVE
Star PieceVisible item ballMt. Moon B2F: Visible item ball in Mt. Moon B2F; check around tile (30, 26).30, 26HIDE MT MOON B2F STAR PIECE
TM46 ThiefVisible item ballMt. Moon B2F: Visible item ball in Mt. Moon B2F; check around tile (35, 5).35, 5HIDE MT MOON B2F TM46
Oran BerryHidden itemRoute 3: Hidden in Route 3; press A on the tile around (26, 9).26, 9Use the Itemfinder or check the described tile.
Great BallHidden itemRoute 4: Hidden in Route 4; press A on the tile around (43, 2).43, 2Use the Itemfinder or check the described tile.
Persim BerryHidden itemRoute 4: Hidden in Route 4; press A on the tile around (5, 4).5, 4Use the Itemfinder or check the described tile.
Razz BerryHidden itemRoute 4: Hidden in Route 4; press A on the tile around (67, 17).67, 17Use the Itemfinder or check the described tile.
TM05 RoarVisible item ballRoute 4: Visible item ball in Route 4; check around tile (67, 5).67, 5HIDE ROUTE4 TM05

Boss Strategy

Boss / branchTeamRewardDanger notesPractical counters
Super Nerd Miguel trainer spriteMiguelSuper Nerd
Grimer FireRed and LeafGreen sprite Grimer Lv. 12 Voltorb FireRed and LeafGreen sprite Voltorb Lv. 12 Koffing FireRed and LeafGreen sprite Koffing Lv. 12
$288This trainer is a routed boss or scripted battle in this section.Use the team table and level range to decide whether to heal, repel, or train before engaging.

Completion Checklist

  • Clear the route plan for Route 3 and Mt. Moon before moving to the next section.
  • Check the wild table for FireRed/LeafGreen version splits, rod methods, Surf, Rock Smash, static Pokemon, gifts, trades, and event-only rows when present.
  • Defeat or intentionally skip optional trainers; use VS Seeker notes where rematches are available.
  • Sweep visible and hidden item rows, including key items, HMs, TMs, berries, fossils, and scripted gifts.
  • Review boss cards and heal before any Rival, Gym Leader, Rocket Admin, Elite Four, Champion, or legendary encounter listed above.

Sources

  • pret/pokefirered: src/data/wild_encounters.json, src/data/trainers.h, src/data/trainer_parties.h, data/maps/*/map.json, data/maps/*/scripts.inc, data/scripts/item_ball_scripts.inc, and graphics/trainers/front_pics.
  • Encounter odds use the FR/LG slot rates: land 20/20/10/10/10/10/5/5/4/4/1/1, Surf and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, and Super Rod 40/40/15/4/1.
  • Generation III mechanics apply throughout: abilities, natures, held items, double battles, and post-game National Dex data are active in these remakes.

Related articles

Pokemon FireRed and LeafGreen Walkthrough HubPhase 2: Cascade BadgeNext: Cerulean City, Route 24, and Route 25