The Grand Underground is a vast wild Pokémon area in Brilliant Diamond and Shining Pearl that lets you capture several Pokémon. Many Pokémon found in the Grand Underground are even rare ones you’d have difficulty searching for in the overworld.
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The number of Pokémon you can encounter in the Grand Underground increase a total of five times:
- When you receive TM96 Strength.
- When you receive TM97 Defog.
- When you beat Candice in Snowpoint City.
- When you receive TM99 Waterfall.
- When you’ve completed the National Pokédex.
Over 200 Pokémon should be discoverable in the Grand Underground at the last stage.
That said, here’s every Pokémon you can encounter in the Grand Underground, when can you encounter them, and where.
Pokémon encountered the moment you can enter the Grand Underground
| Pokémon | All Hideaways |
| Absol | Spacious Caves, Grassland Caves, Dazzling Caves, Big Bluff Cavern, Sunlit Cavern, Stargleam Cavern |
| Bidoof | Spacious Caves, Riverbank Caves, Grassland Caves, Fountainspring Caves, Still-Water Cavern, Sunlit Cavern |
| Budew | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Buizel | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Buneary | Spacious Caves, Grassland Caves, Whiteout Caves, Icy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Glacial Cavern |
| Cascoon (SP only) Silcoon (BD only) | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Cherubi | Grassland Caves, Sunlit Cavern |
| Combee | Grassland Caves, Sunlit Cavern |
| Croagunk | Swampy Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
| Elekid (BD only) | Dazzling Caves, Whiteout Caves, Stargleam Cavern |
| Duskull | Dazzling Caves, Stargleam Cavern |
| Gastly | Dazzling Caves, Stargleam Cavern |
| Gastrodon | Fountainspring Caves |
| Geodude | Spacious Caves, Grassland Caves, Volcanic Caves, Big Bluff Cavern, Typhlo Cavern |
| Glalie | Whiteout Caves, Icy Caves, Glacial Cavern |
| Gligar (BD only) | Grassland Caves, Swampy Caves, Sunlit Cavern, Big Bluff Cavern, Bogsunk Cavern |
| Houndoom | Spacious Caves, Volcanic Caves, Dazzling Caves, Sandsear Caves, Stargleam Cavern, Typhlo Cavern |
| Kricketot | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Lickitung | Spacious Caves, Fountainspring Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
| Machop | Spacious Caves, Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Magby (SP only) | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Magnemite | Spacious Caves, Whiteout Caves, Icy Caves, Glacial Cavern |
| Misdreavus (SP only) | Dazzling Caves, Stargleam Cavern |
| Murkrow (BD only) | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Onix | Grassland Caves, Volcanic Caves, Sandsear Caves, Big Bluff Cavern, Typhlo Cavern |
| Pachirisu | Spacious Caves, Whiteout Caves |
| Pinsir (SP only) | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Big Bluff Cavern |
| Psyduck | Spacious Cave, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Ralts | Fountainspring Caves, Dazzling Caves, Stargleam Cavern |
| Roselia | Grassland Caves, Swampy Caves, Sunlit Cavern, Big Bluff Cavern, Bogsunk Cavern |
| Rhyhorn | Spacious Caves, Grassland Caves, Sandsear Caves, Sunlit Cavern, Big Bluff Cavern, Typhlo Cavern |
| Shellos | Fountainspring Caves |
| Shinx | Spacious Caves, Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Skorupi | Grassland Caves, Volcanic Caves, Swampy Caves, Sandsear Caves, Big Bluff Cavern, Bogsunk Cavern, Typhlo Cavern |
| Smoochum | Dazzling Caves, Icy Caves, Stargleam Cavern, Glacial Cavern |
| Snorunt | Whiteout Caves, Icy Caves, Glacial Cavern |
| Swablu | Spacious Caves, Fountainspring Caves, Whiteout Caves, Icy Caves, Glacial Cavern |
| Swinub | Swampy Caves, Whiteout Caves, Icy Caves, Glacial Cavern, Bogsunk Cavern |
| Scyther (BD only) | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Big Bluff Cavern |
| Teddiursa (SP only) | Spacious Caves, Grassland Caves, Whiteout Caves, Sunlit Cavern, Glacial Cavern |
| Togepi | Fountainspring Caves, Dazzling Caves, Stargleam Cavern |
| Wurmple | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Zubat | Spacious Caves, Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
Related: All TM locations in Pokémon Brilliant Diamond and Shining Pearl
Pokémon unlocked after you get TM96 Strength
| Pokémon | All Hideaways |
| Barboach | Fountainspring Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
| Bibarel | Spacious Caves, Riverbank Caves, Grassland Caves, Fountainspring Caves, Still-Water Cavern, Sunlit Cavern |
| Bronzor | Grassland Caves, Dazzling Caves, Icy Caves, Big Bluff Cavern, Stargleam Cavern |
| Chingling | Spacious Caves, Dazzling Caves, Stargleam Cavern |
| Golbat | Spacious Caves, Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
| Hoothoot | Spacious Caves, Grassland Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Meditite | Dazzling Caves, Whiteout Caves, Stargleam Cavern |
| Ponyta | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Stunky, Skunktank (BP only) | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
Pokémon unlocked after you get TM97 Defog
| Pokémon | All Hideaways |
| Aipom | Spacious Caves |
| Girafarig | Dazzling Caves, Stargleam Cavern |
| Graveller | Spacious Caves, Grassland Caves, Volcanic Caves, Big Bluff Cavern, Typhlo Cavern |
| Hippopotas | Grassland Caves, Sandsear Caves, Big Bluff Cavern |
| Kadabra | Dazzling Caves, Stargleam Cavern |
| Machoke | Spacious Caves, Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Munchlax | Spacious Caves, Grassland Caves, Whiteout Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Quagsire | Fountainspring Caves, Swampy Caves, Bogsunk Cavern |
| Tentacool | Fountainspring Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
| Purugly | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Wingull | Spacious Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Wooper | Fountainspring Caves, Swampy Caves, Bogsunk Cavern |
Pokémon unlocked after you beat the Snowpoint Gym
| Pokémon | All Hideaways |
| Gible | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Glameow (SP only) | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Luxio | Spacious Caves, Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Mr. Mime | Dazzling Caves, Whiteout Caves, Icy Caves, Stargleam Cavern, Glacial Cavern |
| Pelipper | Spacious Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Sneasel | Dazzling Caves, Whiteout Caves, Icy Caves, Stargleam Cavern, Glacial Cavern |
| Snover | Whiteout Caves, Icy Caves, Glacial Cavern |
| Tentacruel | Fountainspring Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
Pokémon unlocked after you get TM99 Waterfall
| Pokémon | All Hideaways |
| Gabite | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Mantyke | Spacious Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Octillery | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Whiscash | Fountainspring Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Bogsunk Cavern |
Related: Where to find all gift Pokémon in Brilliant Diamond and Shining Pearl
Pokémon unlocked after you get the National Pokédex
| Pokémon | All Hideaways |
| Ariados | Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
| Aron | Rocky Caves, Whiteout Caves, Icy Caves, Big Bluff Cavern, Glacial Cavern |
| Bagon, Shelgon (SP only) | Spacious Caves, Dazzling Caves, Stargleam Cavern |
| Baltoy | Rocky Caves, Dazzling Caves, Big Bluff Cavern, Stargleam Cavern |
| Banette | Dazzling Caves, Stargleam Cavern |
| Beldum | Rocky Caves, Whiteout Caves, Icy Cave, Big Bluff Cavern, Glacial Cavern |
| Bellsprout | Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Bulbasaur | Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Cacnea | Grassland Caves, Rocky Caves, Swampy Caves, Sunlit Cavern, Big Bluff Cavern, Bogsunk Cavern |
| Cacturne | Grassland Caves, Rocky Caves, Swampy Caves, Sunlit Cavern, Big Bluff Cavern, Bogsunk Cavern |
| Camerupt | Rocky Caves, Volcanic Caves, Sandsear Caves, Big Bluff Cavern, Typhlo Cavern |
| Carvanha | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Caterpie (BD only) | Spacious Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Charmander | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Chikorita | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Chimchar | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Chinchou | Fountainspring Caves, Icy Caves, Glacial Cavern |
| Clamperl | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Corphish | Spacious Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Corsola | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Crawdaunt | Spacious Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Cubone | Rocky Caves, Dazzling Caves, Riverbank Caves, Still-Water Cavern, Stargleam Cavern |
| Cyndaquil | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Delibird | Whiteout Caves, Icy Caves, Glacial Cavern |
| Ditto | Dazzling Caves, Stargleam Cavern |
| Doduo | Spacious Caves, Grassland Caves, Sunlit Cavern |
| Dratini | Fountainspring Caves |
| Drowzee | Dazzling Caves, Stargleam Cavern |
| Dusclops | Dazzling Caves, Stargleam Cavern |
| Ekans (BD only) | Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Farfetch'd | Spacious Caves, Grassland Caves, Fountainspring Cave, Sunlit Cavern |
| Flaaffy | Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Furret | Spacious Caves, Rocky Caves, Volcanic Caves, Whiteout Caves, Big Bluff Cavern, Typhlo Cavern |
| Gloom | Spacious Caves, Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Grimer | Swampy Caves, Dazzling Caves, Stargleam Cavern, Bogsunk Cavern |
| Growlithe (BD only) | Spacious Caves, Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Hoppip | Grassland Caves, Sunlit Cavern |
| Horsea | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Illumise | Grassland Caves, Dazzling Caves, Sunlit Cavern, Stargleam Cavern |
| Kecleon (BD only) | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Kirlia | Dazzling Caves, Stargleam Cavern |
| Krabby | Spacious Caves, Dazzling Caves, Stargleam Cavern |
| Lairon | Rocky Caves, Whiteout Caves, Icy Caves, Big Bluff Cavern, Glacial Cavern |
| Lanturn | Fountainspring Caves, Icy Caves, Glacial Cavern |
| Larvitar, Pupitar (BD only) | Rocky Caves, Big Bluff Cavern |
| Ledian | Grassland Caves, Fountainspring Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Magcargo | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Mankey | Spacious Caves, Grassland Caves, Sunlit Cavern |
| Mareep | Grassland Caves, Whiteout Caves, Sunlit Cavern |
| Mawile (BD only) | Dazzling Caves, Stargleam Cavern |
| Mightyena | Spacious Caves, Dazzling Caves, Icy Caves, Stargleam Cavern, Glacial Cavern |
| Miltank | Spacious Caves, Grassland Caves, Sunlit Cavern |
| Mudkip | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Natu | Spacious Caves, Dazzling Caves |
| Nidoran, Nidorina, Nidorino | Grassland Caves, Swampy Caves, Dazzling Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Stargleam Cavern, Bogsunk Cavern |
| Nincada | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Numel | Rocky Caves, Volcanic Caves, Sandsear Caves, Big Bluff Cavern, Typhlo Cavern |
| Oddish | Spacious Caves, Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Paras | Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
| Phanpy | Rocky Caves, Big Bluff Cavern |
| Pineco | Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
| Piplup | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Poliwag | Grassland Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Poliwhirl | Grassland Caves, Fountainspring Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Poochyena | Spacious Caves, Dazzling Caves, Icy Caves, Stargleam Cavern, Glacial Cavern |
| Primeape | Spacious Caves, Grassland Caves, Sunlit Cavern |
| Quilfish | Fountainspring Caves, Swampy Caves, Riverbank Cave, Still-Water Cavern |
| Raticate | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Rattata | Spacious Caves, Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Rhydon | Spacious Caves, Rocky Caves, Sandsear Caves, Sunlit Cavern, Big Bluff Cavern, Typhlo Cavern |
| Sabeleye (SP only) | Dazzling Caves, Stargleam Cavern |
| Sandshrew, Sandslash (SP only) | Spacious Caves, Rocky Caves, Sandsear Caves, Big Bluff Cavern |
| Seedot, Nuzleaf (BD only) Lotad, Lombre (SP only) | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Seel, Dewgong (BD only) | Fountainspring Caves, Whiteout Caves, Icy Caves, Glacial Cavern |
| Sentret | Spacious Caves, Rocky Caves, Volcanic Caves, Whiteout Caves, Big Bluff Cavern, Typhlo Cavern |
| Shellder | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Shuckle | Grassland Caves, Rocky Caves, Riverbank Cave, Still-Water Cavern, Sunlit Cavern, Big Bluff Cavern |
| Skiploom | Grassland Caves, Sunlit Cavern |
| Skitty | Spacious Caves |
| Slowpoke (SP only) | Grassland Caves, Dazzling Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Stargleam Cavern |
| Slugma | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Snubbull | Dazzling Caves, Stargleam Cavern |
| Solrock (BD only) Luntatone (SP only) | Dazzling Caves, Riverbank Caves, Still-Water Cavern, Stargleam Cavern |
| Spheal, Sealeo (SP only) | Whiteout Caves, Icy Caves, Glacial Cavern |
| Squirtle | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Staryu | Fountainspring Caves, Icy Caves, Riverbank Caves, Still-Water Cavern, Glacial Cavern |
| Sunkern | Grassland Caves, Sunlit Cavern |
| Surskit | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Tangela | Swampy Caves, Bogsunk Cavern |
| Tangrowth | Swampy Caves, Bogsunk Cavern |
| Tauros | Spacious Caves, Grassland Caves, Fountainspring Caves, Rocky Cave, Whiteout Caves, Icy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Big Bluff Cavern, Glacial Cavern |
| Teddirusa (SP only) | Spacious Caves, Grassland Caves, Rocky Caves, Whiteout Caves, Icy Caves, Sunlit Cavern, Glacial Cavern |
| Torchic | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Torkoal | Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Totodile | Fountainspring Caves, Riverbank Caves, Still-Water Cavern |
| Trapinch | Rocky Caves, Sandsear Caves, Big Bluff Cavern |
| Treecko | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Tropius | Grassland Caves, Swampy Caves, Sunlit Cavern, Bogsunk Cavern |
| Turtwig | Grassland Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Tyrogue | Spacious Caves, Grassland Caves, Whiteout Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern |
| Venomoth | Spacious Caves, Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Venonat | Spacious Caves, Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Vibrava | Grassland Caves, Rocky Caves, Sunlit Cavern, Big Bluff Cavern |
| Volbeat | Grassland Caves, Dazzling Caves, Sunlit Cavern, Stargleam Cavern |
| Voltorb | Spacious Caves, Dazzling Caves, Stargleam Cavern |
| Vulpix (SP only) | Spacious Caves, Volcanic Caves, Sandsear Caves, Typhlo Cavern |
| Walrein | Whiteout Caves, Icy Caves, Glacial Cavern |
| Weedle (SP only) | Spacious Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Weepinbell | Grassland Caves, Swampy Caves, Riverbank Caves, Still-Water Cavern, Sunlit Cavern, Bogsunk Cavern |
| Weezing | Swampy Caves, Bogsunk Cavern |
| Wobbuffet | Dazzling Caves, Stargleam Cavern |
| Zangoose (BD only) Seviper (SP only) | Grassland Caves, Swampy Caves, Dazzling Caves, Sunlit Cavern, Stargleam Cavern, Bogsunk Cavern |
| Zigzagoon | Spacious Caves, Rocky Caves, Big Bluff Cavern |
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Bianca Versoza is Pro Game Guides' Weekend Editor. With over three years of experience in gaming journalism, she specializes in anything remotely turn-based and strategic, like Pokémon, Valkyria, and Honkai: Star Rail. Bianca is a huge fan of Square Enix, RPGs, party games, and visual novels, but will play anything with a banger OST. She's a proud early bird.