Altering Cave

Altering Cave へんげのどうくつ Altering Cave "Wild Missingno. appeared!"
Map description:	This island has been known by this name since the distant past. No one today knows where it got this name, however.FRLG
Location:	Outcast Island (Sevii Islands) Route 103 (Hoenn)
Region:	Sevii Islands and Hoenn
Generations:	III
Location of Altering Cave in Sevii Islands.
Pokémon world locations

The Altering Cave (Japanese: へんげのどうくつ Altering Cave) is a mysterious cave found in Pokémon FireRed, LeafGreen, and Emerald.

Altering Cave in Hoenn

Only Zubat can be found in it. It would have been possible for the Altering Cave's wild Pokémon to be altered by using Mystery Gift at a Wonder Spot (hence the cave's name), but this data was never distributed.

In the core series games

Location

In Pokémon FireRed and LeafGreen, Altering Cave is found north of Six Island on Outcast Island.

In Pokémon Emerald, Altering Cave is found on Route 103, on the east bank of the inlet that passes through the center of the route. The entrance of the cave is only open after the player enters the Hall of Fame.

Pokémon

All of the unreleased event Pokémon can be found in the extended area of the Safari Zone in Pokémon Emerald, except for Smeargle, which is found in Artisan Cave at the Battle Frontier. In addition, their evolutionary lines are all available in Pokémon Colosseum as Shadow Pokémon.

Pokémon FireRed and LeafGreen use standard wild held items for the Pokémon in Altering Cave; Pokémon Emerald uses a special set of held items exclusive to the event, which were programmed to have a 5% chance of occurring.

Pokémon	Games						Location	Levels	Rate
Zubat	FR		LG		E		Cave	6, 8, 10, 12, 14, 16	100%
Event-exclusive Pokémon (unreleased)
Mareep	FR		LG		E		Cave	3-13	100%
Aipom	FR		LG		E		Cave	18-28	100%
Pineco	FR		LG		E		Cave	19-29	100%
Shuckle	FR		LG		E		Cave	18-28	100%
Teddiursa	FR		LG		E		Cave	18-28	100%
Houndour	FR		LG		E		Cave	12-20	100%
Stantler	FR		LG		E		Cave	18-28	100%
Smeargle	FR		LG		E		Cave	18-28	100%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Unused event text

This text would appear after the player has used Mystery Gift to receive the extra Pokémon.

FireRed & LeafGreen

Thank you for using the MYSTERY
GIFT System.

Recently, there have been rumors
of rare POKéMON appearances.

The rumors are about ALTERING
CAVE on OUTCAST ISLAND.

Why not visit there and check if
the rumors are indeed true?

Emerald

Thank you for using the MYSTERY
GIFT System.

There appears to be a rumor about
rare POKéMON sightings.

The sightings reportedly came from
the ALTERING CAVE on ROUTE 103.

Perhaps it would be worthwhile for
you to investigate this rumor.

Layout

Version	1F
FireRed
LeafGreen
Emerald

Music

The background music played inside is Caves of Mt. Moon. This applies to both Pokémon FireRed and LeafGreen and Pokémon Emerald.

In the manga

Pokémon Adventures

FireRed & LeafGreen arc

The Altering Cave was mentioned by Orm in Put Your Beast Foot Forward.

Trivia

• Had a distribution been held to change the wild Pokémon in Altering Cave, this would have been the only way to obtain the Berry Juice in Generation III, as wild Shuckle are programmed to always be holding it in Pokémon FireRed and LeafGreen, and Shuckle and Aipom would have held it 5% of the time (in Altering Cave only) in Pokémon Emerald. Instead, the item is entirely unobtainable in Generation III.
  • It would also have been the only way to legitimately obtain Mareep that are under level 5 (Down to level 3) in Generation III, since all Pokémon in that generation hatch at level 5, and no other obtainable Mareep within Generation III are under level 5.

In other languages

Language Title Chinese Cantonese 變化的洞窟 Binfa-dīk Duhngfāt Mandarin 變化洞窟 / 变化洞窟 Biànhuà Dòngkū French Grotte Métamo German Wandelhöhle Italian Grotta Mutevole Korean 요괴의 굴 Altering Cave Brazilian Portuguese Caverna da Alteração Spanish Cueva Cambiante Vietnamese Hang Biến Hóa

Sevii Islands
Settlements One Island • Two Island • Three Island • Four Island • Five Island • Six Island • Seven Island Routes Treasure Beach • Kindle Road • Cape Brink • Bond Bridge • Three Isle Port • Three Isle Path • Resort Gorgeous • Water Labyrinth Five Isle Meadow • Memorial Pillar • Outcast Island • Green Path • Water Path • Ruin Valley • Trainer Tower • Canyon Entrance Sevault Canyon • Tanoby Ruins Landmarks Mt. Ember • Berry Forest • Icefall Cave • Rocket Warehouse • Lost Cave • Altering Cave • Pattern Bush Dotted Hole • Tanoby Key • Tanoby Chambers • Navel Rock • Birth Island Access to Kanto

Hoenn
Settlements Littleroot Town • Oldale Town • Petalburg City • Rustboro City • Dewford Town • Slateport City • Mauville City • Verdanturf Town Fallarbor Town • Lavaridge Town • Fortree City • Lilycove City • Mossdeep City • Sootopolis City • Pacifidlog Town • Ever Grande City Battle Frontier • Battle Resort Routes 101 • 102 • 103 • 104 • 105 • 106 • 107 • 108 • 109 • 110 • 111 • 112 • 113 • 114 • 115 • 116 • 117 • 118 119 • 120 • 121 • 122 • 123 • 124 • 125 • 126 • 127 • 128 • 129 • 130 • 131 • 132 • 133 • 134 • Underwater Landmarks Petalburg Woods • Rusturf Tunnel • Island Cave • Granite Cave • Abandoned Ship • Sea Mauville • Oceanic Museum Seaside Cycling Road • Trick House • Mauville Game Corner • New Mauville • Trainer Hill • Desert Ruins • Mirage Tower • Fiery Path Jagged Pass • Mt. Chimney • Desert Underpass • Meteor Falls • Weather Institute • Scorched Slab • Ancient Tomb • Safari Zone • Mt. Pyre Lilycove Museum • Shoal Cave • Team Aqua Hideout • Team Magma Hideout (Lilycove • Jagged Pass) • Mossdeep Space Center • Seafloor Cavern Cave of Origin • Mirage Island • Sky Pillar • Victory Road • Pokémon League • Sealed Chamber • Artisan Cave • Altering Cave • Southern Island Marine Cave • Terra Cave • Contest Hall • Battle Maison • Battle Tower • Battle Tent • Secret Islet • Secret Meadow • Secret Shore Mirage spots Mirage Caves • Mirage Forests • Mirage Islands • Mirage Mountains Crescent Isle • Fabled Cave • Gnarled Den • Nameless Cavern • Pathless Plain • Trackless Forest Access to Birth Island • Faraway Island • Navel Rock • Sky

This article is part of Project Locations, a Bulbapedia project that aims to write comprehensive articles on every location in the Pokémon world.