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Pokemon Yellow Phase 10: Post-Game + Completion Walkthrough

Phase 10 of the Pokemon Yellow walkthrough covering Cerulean Cave, Mewtwo, Yellow trades, fossils, Game Corner prizes, and external completion cleanup.

By Damodar Sharma Updated June 23, 2026 Walkthrough

Cerulean Cave, Mewtwo, Yellow trades, fossils, Game Corner prizes, and external completion cleanup.

Phase 10

Target60-70+ RewardMewtwo, Cerulean Cave, Pokedex cleanup Sections2
Charizard Yellow sprite Blastoise Yellow sprite

Phase Sections

01
Cerulean Cave Completion
02
Trade, Fossil, Prize, and External Cleanup

Phase Data Rollup

Section Source maps Wild rows Trainers Items
Cerulean Cave Completion338015
Trade, Fossil, Prize, and External Cleanup81112

Cerulean Cave Completion

Enter Cerulean Cave after becoming Champion, collect its rare encounters and items, and catch Mewtwo.

Source maps

Cerulean Cave 1F, Cerulean Cave 2F, and Cerulean Cave B1F.

Wild rows38 Trainers0 Items15

Route plan

Cerulean Cave has the highest wild levels in Yellow. Bring Surf, strong balls, status, and an escape plan.

Wild Pokemon

Cerulean Cave 1F

Cerulean Cave 1F wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
Tall grass / cave floor
Golbat Yellow sprite Golbat 50-5540%—
Graveler Yellow sprite Graveler 4515%—
Gloom Yellow sprite Gloom 559.8%—
Weepinbell Yellow sprite Weepinbell 559.8%—
Sandslash Yellow sprite Sandslash 529.8%—
Ditto Yellow sprite Ditto 55-605.5%—
Venomoth Yellow sprite Venomoth 545.1%—
Parasect Yellow sprite Parasect 545.1%—
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
Goldeen Yellow sprite Goldeen 2525%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 3525%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 4525%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 5525%Yellow Super Rod slot table.

Cerulean Cave 2F

Cerulean Cave 2F wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
Tall grass / cave floor
Golbat Yellow sprite Golbat 52-5740%—
Graveler Yellow sprite Graveler 5015%—
Sandslash Yellow sprite Sandslash 569.8%—
Rhyhorn Yellow sprite Rhyhorn 509.8%—
Ditto Yellow sprite Ditto 609.8%—
Rhydon Yellow sprite Rhydon 58-605.5%—
Gloom Yellow sprite Gloom 585.1%—
Weepinbell Yellow sprite Weepinbell 585.1%—

Cerulean Cave B1F

Cerulean Cave B1F wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
Tall grass / cave floor
Golbat Yellow sprite Golbat 54-5940%—
Graveler Yellow sprite Graveler 5515%—
Ditto Yellow sprite Ditto 60-6515%—
Rhyhorn Yellow sprite Rhyhorn 529.8%—
Rhydon Yellow sprite Rhydon 629.8%—
Lickitung Yellow sprite Lickitung 50-555.5%—
Chansey Yellow sprite Chansey 565.1%—
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
Goldeen Yellow sprite Goldeen 3025%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 4025%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 5025%Yellow Super Rod slot table.
Seaking Yellow sprite Seaking 6025%Yellow Super Rod slot table.
Static Pokemon
Mewtwo Yellow sprite Mewtwo 70StaticInteract with the overworld Pokemon.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
Rare CandyVisible item ballVisible item ball at (29, 16) in Cerulean Cave 1F.(29, 16)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ElixerVisible item ballVisible item ball at (7, 11) in Cerulean Cave 1F.(7, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ReviveVisible item ballVisible item ball at (29, 9) in Cerulean Cave 1F.(29, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (18, 3) in Cerulean Cave 1F.(18, 3)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Rare CandyVisible item ballVisible item ball at (0, 11) in Cerulean Cave 2F.(0, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (16, 7) in Cerulean Cave 2F.(16, 7)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ReviveVisible item ballVisible item ball at (19, 11) in Cerulean Cave 2F.(19, 11)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Full RestoreVisible item ballVisible item ball at (27, 9) in Cerulean Cave 2F.(27, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (26, 1) in Cerulean Cave B1F.(26, 1)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (2, 13) in Cerulean Cave B1F.(2, 13)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ReviveVisible item ballVisible item ball at (3, 13) in Cerulean Cave B1F.(3, 13)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ElixerVisible item ballVisible item ball at (15, 3) in Cerulean Cave B1F.(15, 3)Reach this tile; HMs or story flags may be needed for late-game dungeons.
PP UpHidden itemHidden on the searchable tile at (18, 7) in Cerulean Cave 1F.(18, 7)Press A on the hidden tile or use the Itemfinder nearby.
PP UpHidden itemHidden on the searchable tile at (16, 13) in Cerulean Cave 2F.(16, 13)Press A on the hidden tile or use the Itemfinder nearby.
PP UpHidden itemHidden on the searchable tile at (8, 14) in Cerulean Cave B1F.(8, 14)Press A on the hidden tile or use the Itemfinder nearby.

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Champion Rival trainer spriteChampion RivalMewtwo capture prep
Mewtwo Yellow sprite Mewtwo Lv. 70
Static encounterMewtwo is level 70 with huge Special and Speed.Bring Ultra Balls, status, a sleep/paralysis user, and a Pokemon that can take Psychic without fainting instantly.

Completion Checklist

  • Collect every Cerulean Cave item.
  • Catch rare high-level wild Pokemon.
  • Capture Mewtwo.

Trade, Fossil, Prize, and External Cleanup

Use trades, fossils, prize Pokemon, Yellow-only gifts, and external trade planning to close Pokedex gaps.

Source maps

Route 2 Trade House, Underground Path Route 5, Vermilion Trade House, Route 11 Gate 2F, Route 18 Gate 2F, Cinnabar Lab Trade Room, Cinnabar Lab Fossil Room, and Game Corner.

Wild rows1 Trainers1 Items12

Route plan

Yellow cannot complete the Pokedex alone without external trades. Use this page as the cleanup ledger after the credits.

Wild Pokemon

Game Corner wild Pokemon by encounter method, levels, rate, and requirements
PokémonLevelsRateNotes
External trade or event
Mew Yellow sprite Mew VariesUnavailableMew is not obtainable through normal Yellow gameplay; use a legitimate distribution, external trade, or explicitly noted glitch route.

Trainers

Route order Trainer Team Reward Optional / rematch note
1. Game Corner (9, 5)Rocket trainer spriteRocketParty #7
Raticate Yellow sprite Raticate Lv. 20 Zubat Yellow sprite Zubat Lv. 20
$600One-time trainer; no rematch in Yellow.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
10 CoinsHidden coinsHidden on the searchable tile at (0, 8) in Game Corner.(0, 8)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (1, 16) in Game Corner.(1, 16)Press A on the Game Corner floor tile.
20 CoinsHidden coinsHidden on the searchable tile at (3, 11) in Game Corner.(3, 11)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (3, 14) in Game Corner.(3, 14)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (4, 12) in Game Corner.(4, 12)Press A on the Game Corner floor tile.
20 CoinsHidden coinsHidden on the searchable tile at (9, 12) in Game Corner.(9, 12)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (9, 15) in Game Corner.(9, 15)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (16, 14) in Game Corner.(16, 14)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (10, 16) in Game Corner.(10, 16)Press A on the Game Corner floor tile.
40 CoinsHidden coinsHidden on the searchable tile at (11, 7) in Game Corner.(11, 7)Press A on the Game Corner floor tile.
100 CoinsHidden coinsHidden on the searchable tile at (15, 8) in Game Corner.(15, 8)Press A on the Game Corner floor tile.
10 CoinsHidden coinsHidden on the searchable tile at (12, 15) in Game Corner.(12, 15)Press A on the Game Corner floor tile.

Completion Checklist

  • Finish all in-game trades.
  • Revive fossil and Old Amber Pokemon.
  • Buy or trade for Game Corner prizes.
  • Plan external trades for Pokemon unavailable in a solo Yellow save.

Sources

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