Hidden Grotto

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Hidden Grotto (Japanese: 隠し穴 Hidden Hollow) is a feature in Pokémon Black 2 and White 2 that allows the player to find Pokémon with Hidden Abilities or items. The contents of the Hidden Grottoes are random, and if they are empty, for each 256 steps, they generally have a 5% chance to regenerate, usually with different content than what was inside on the previous visit; however, the chance can be increased (to 15%, 25%, 35%, or 55%) with the various levels of Grotto Pass Power. Hidden Grottoes will not regenerate unless the items are obtained or the Pokémon are caught or defeated by the player.

Locations

Twenty Hidden Grottoes are located all around Unova. Some areas have two Hidden Grottoes, while others have only one.

Items

Each Hidden Grotto has the same items available, with the exception of the Evolution stones. The chance that an item will be spawned when a Grotto is regenerated is normally 80% (40% for hidden items and 40% for visible items), but this decreases to 51.2% if any level of Grotto Pass Power is in effect.

Items in each Hidden Grotto

Every Grotto has a chance to spawn the following items at the following rates:

Visible items

Item		Rate
	Poké Ball	12.5%
	Great Ball	5%
	Ultra Ball	2%
	Potion	6.25%
	Super Potion	2.5%
	Hyper Potion	1%
	Repel	6.25%
	Super Repel	2.5%
	Max Repel	1%

Hidden items

Item		Rate
	Damp Mulch	6.25%
	Growth Mulch	6.25%
	Stable Mulch	6.25%
	Gooey Mulch	6.25%
	TinyMushroom	7.5%
	Big Mushroom	2.5%
	Red Shard	1%
	Green Shard	1%
	Yellow Shard	1%
	Blue Shard	1%
	Rare Candy	0.25%
	PP Up	0.5%
	PP Max	0.25%

Items in specific Hidden Grottoes

Item		Rate	Locations
	Fire Stone	0.25%	Route 2 Route 3 (dark grass) Route 5 Route 6 (near Breeder) Route 7 Route 9 Route 13 (southwest from the two cuttable trees) Route 18 Route 22 Route 23 Floccesy Ranch Giant Chasm Abundant Shrine (near Youngster) Lostlorn Forest Pinwheel Forest (both)
	Water Stone	0.25%
	Thunderstone	0.25%
	Leaf Stone	0.25%
	Moon Stone	0.25%	Route 6 (Mistralton Cave) Route 13 (above the stairs near the entrance to Giant Chasm) Abundant Shrine (right of the shrine)
	Sun Stone	0.25%
	Shiny Stone	0.25%
	Dusk Stone	0.25%
	Dawn Stone	1%	Route 3 (near the pond)

Pokémon

The chance that a Pokémon will be spawned when a Grotto is regenerated is normally 20%, but this increases to 48.8% if any level of Grotto Pass Power is in effect, because the game will reroll up to two additional times in search of a Pokémon as opposed to an item.

Pokémon that appear in Hidden Grottoes have non-standard gender distribution rates, and the gender of the Pokémon is predetermined and cannot be soft resetted for. Those species that are gender unknown, all-male, or all-female are unaffected. Most of the rest will be female 30% of the time, but Clefairy, Corsola, Minccino, and Pachirisu will be female 60% of the time, Dragonite, Poliwhirl, and Vulpix will be female 10% of the time, Combee will be female 5% of the time, and in White 2 Nosepass will never be female.

Route 2

Pokémon	Games						Location	Levels	Rate
Nidoran♀	B2			W2				55-59	2%
Nidoran♂	B2			W2				55-59	2%
Granbull	B2			W2				55-59	1%
Watchog	B2			W2				55-59	15%
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.

Route 3

Pokémon	Games						Location	Levels	Rate
Dark grass
Manectric	B2			W2				55-59	4%
Pachirisu	B2			W2				55-59	15%
Zebstrika	B2			W2				55-59	1%
Pond
Venonat	B2			W2				55-59	4%
Lombre	B2			W2				55-59	1%
Bibarel	B2			W2				55-59	15%
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.

Route 5

Pokémon	Games						Location	Levels	Rate
Liepard	B2			W2				20-24	4%
Minccino	B2			W2				20-24	1%
Foongus	B2			W2				20-24	15%
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.

Route 6

Pokémon	Games						Location	Levels	Rate
Near Pokémon Breeder
Dunsparce	B2			W2				25-29	1%
Woobat	B2			W2				25-29	4%
Foongus	B2			W2				25-29	15%
Mistralton Cave
Nosepass	B2			W2				25-29	1%
Woobat	B2			W2				25-29	4%
Foongus	B2			W2				25-29	15%
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.

Route 7

Pokémon	Games						Location	Levels	Rate
Zangoose	B2			W2				30-34	7.5%
Seviper	B2			W2				30-34	7.5%
Watchog	B2			W2				30-34	4%
Cubchoo	B2			W2				30-34	1%
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.

Route 9

Pokémon	Games						Location	Levels	Rate
Muk	B2			W2				35-39	2%
Liepard	B2			W2				35-39	15%
Garbodor	B2			W2				35-39	2%
Bouffalant	B2			W2				35-39	1%
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.

Route 13

Pokémon	Games						Location	Levels	Rate
Stairs
Spheal	B2			W2				35-39	1%
Drifloon	B2			W2				35-39	4%
Foongus	B2			W2				35-39	15%
Giant Chasm
Tangela	B2			W2				35-39	4%
Skorupi	B2			W2				35-39	1%
Foongus	B2			W2				35-39	15%
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.

Route 18

Pokémon	Games						Location	Levels	Rate
Kingler	B2			W2				55-59	7.5%
Dragonite	B2			W2				55-59	1%
Corsola	B2			W2				55-59	7.5%
Chatot	B2			W2				55-59	4%
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.

Route 22

Pokémon	Games						Location	Levels	Rate
Pelipper	B2			W2				40-44	4%
Amoonguss	B2			W2				40-44	15%
Mienfoo	B2			W2				50-54	1%
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.

Route 23

Pokémon	Games						Location	Levels	Rate
Golduck	B2			W2				50-54	2%
Gligar	B2			W2				50-54	1%
Zangoose	B2			W2				50-54	7.5%
Seviper	B2			W2				50-54	7.5%
Absol	B2			W2				50-54	2%
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.

Abundant Shrine

Pokémon	Games						Location	Levels	Rate
Near Youngster
Vulpix	B2			W2				35-39	1%
Bronzor	B2			W2				35-39	4%
Amoonguss	B2			W2				35-39	15%
Shrine
Golduck	B2			W2				35-39	4%
Swablu	B2			W2				35-39	1%
Amoonguss	B2			W2				35-39	15%
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.

Giant Chasm

Pokémon	Games						Location	Levels	Rate
Clefairy	B2			W2				45-49	15%
Ditto	B2			W2				45-49	1%
Sneasel	B2			W2				45-49	2%
Metang	B2			W2				45-49	2%
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.

Lostlorn Forest

Pokémon	Games						Location	Levels	Rate
Pinsir	B2			W2				20-24	0.75%
Pinsir	B2			W2				20-24	0.25%
Heracross	B2			W2				20-24	0.25%
Heracross	B2			W2				20-24	0.75%
Combee	B2			W2				20-24	15%
Leavanny	B2			W2				20-24	4%
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.

Pinwheel Forest

Pokémon	Games						Location	Levels	Rate
Outer area
Poliwhirl	B2			W2				55-59	1%
Hariyama	B2			W2				55-59	15%
Hariyama	B2			W2				55-59	1%
Medicham	B2			W2				55-59	1%
Medicham	B2			W2				55-59	15%
Bagon	B2			W2				55-59	3%
Inner area
Butterfree	B2			W2				55-59	4%
Beedrill	B2			W2				55-59	4%
Murkrow	B2			W2				55-59	1%
Breloom	B2			W2				55-59	3.75%
Amoonguss	B2			W2				55-59	11.25%
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.

Floccesy Ranch

Pokémon	Games						Location	Levels	Rate
Marill	B2			W2				10-14	15%
Dunsparce	B2			W2				10-14	1%
Herdier	B2			W2				10-14	4%
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.

Funfest Missions

Three special Funfest Missions (one exclusive to each version, plus one that was event-exclusive) ask players to search for Pokémon in Hidden Grottoes, and also temporarily replace the contents of some of those Hidden Grottoes with Pokémon that do not normally appear there. These specially spawned Pokémon have a 20% chance to be female.

Pokémon	Games						Location	Levels	Rate
Glameow	B2			W2				Varies	Sometimes
Stunky	B2			W2				Varies	Sometimes
Eevee	B2			W2				Varies	Sometimes
Vaporeon	B2			W2				Varies	Sometimes
Jolteon	B2			W2				Varies	Sometimes
Flareon	B2			W2				Varies	Sometimes
Espeon	B2			W2				Varies	Sometimes
Umbreon	B2			W2				Varies	Sometimes
Leafeon	B2			W2				Varies	Sometimes
Glaceon	B2			W2				Varies	Sometimes
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.

Mission Distribution Dates

Trivia

• The ambient background music that plays in the Hidden Grottoes does not appear on the soundtrack for the games.
• If the player has a Repel active and it wears off on the final tile before the exit, they will be prevented from leaving until they move up and back down.

In other languages

Related articles

• Dual-slot mode
• Poké Radar

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