The Diamond and Pearl remakes are ideal representations of the 2006 games with many new features. Among the most important, we note the improvement of the Great Underground that the ILCA studio has carefully modified.
If the Sinnoh Pokédex has 151 Pokémon, in the Great Underground, it is possible to capture many more Pokémon after unlocking the National Pokédex! Players can find first, second, and even third-generation creatures.
From Fire types, Plants, Rocks, and Poison discover a complete list of all the Pokémon present in the Great Underground.
All Pokémon in the Great Underground – Before the National Pokédex
The list is quite long. Pokémon are sorted alphabetically:
Absol – Spacious Grotto, Meadow Grotto, Dazzling Grotto, Sunny Cavern, Piton Cavern, and Starry Night Cavern
Apitrini – Grotto of the Meadow and Sunny Cave
Archeomire – Cave of Rocks, Dazzling Cave, Cave of Stalactites, Cave of Piton, Cave of Starry Night, and Cave of Glacier (After obtaining CS Force )
Armulys – Prairie Grotto, River Grotto, Water Mirror Cavern, and Sunshine Cavern ( Sparkling Diamond only )
Axoloto – Underwater Cave, Swamp Cave, and Bottomless Swamp Cavern (After getting CS Anti-Mist )
Babimanta – Spacious Cave, Underground Water Cave, River Cave, and Water Mirror Cavern (After getting CS Cascade )
Barbicha – Underground Water Cave, Swamp Cave, River Cave, Water Mirror Cavern, and Bottomless Swamp Cavern (After obtaining CS Cascade )
Barloche – Underground Water Grotto, Swamp Grotto, River Grotto, Water Mirror Cavern and Bottomless Swamp Cavern (After obtaining CS Force )
Bekipan – Spacious Cave, Underground Water Cave, River Cave, Water Mirror Cavern (After getting Arena 7 Badge )
Blindalys – Prairie Grotto, River Grotto, Water Mirror Cavern, and Sunny Cavern ( Sparkling Pearl only )
Blizzy – Snow Cave, Stalactite Cave, and Glacier Cavern (After getting Arena 7 Badge )
Capumain – Spacious Cave (After obtaining the Anti-Mist CS )
Carmache – Underground Water Cave, River Cave, and Water Mirror Cavern (After obtaining CS Cascade )
Castorno – Spacious Cave, Meadow Cave, Underwater Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern (After getting CS Force )
Ceribou – Grotte de la Prairie and Sunny Cave
Chaffreux – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave ( Sparkling Pearl only )
Chaglam – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern (After getting Arena 7 Badge, Glittering Pearl only )
Cornebre – Spacious Cave, Meadow Cave, River Cave, Reflecting Water Cave, and Sunshine Cave ( Sparkling Diamond only )
Cradopaud – Swamp Cave, River Cave, Water Mirror Cavern, and Bottomless Swamp Cavern
Crikzik – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cave, and Sunny Cave
Houndoom – Spacious Cave, Molten Cave, Dazzling Cave, Burning Sands Cave, Starry Night Cavern, and Typhlosion Cavern
Elekid – Dazzling Cave, Snow Cave, Starry Night Cavern, and Glacier Cavern ( Sparkling Diamond only )
Excelangue – Spacious Cave, Underground Water Cave, Swamp Cave, River Cave, Water Mirror Cave, and Bottomless Swamp Cave
Fantominus – Dazzling Grotto and Starry Night Cavern
Sneasel – Snow Cave, Stalactite Cave, and Glacier Cavern (After getting Arena 7 Badge )
Dreamfire – Dazzling Cave and Starry Night Cavern (Sparkling Pearl only )
Girafarig – Dazzling Grotto and Starry Night Cavern (After obtaining CS Anti-Mist )
Goélise – Spacious Grotto, Underwater Grotto, River Grotto, and Water Mirror Cavern (After obtaining the Anti-Mist CS )
Goinfrex – Spacious Cave, Meadow Cave, Snow Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern (After obtaining the Anti-Mist CS )
Gravalanch – Spacious Cave, Cave of Rocks, Magma Cave, Caverne du Piton, and Caverne Typhlosion (After obtaining CS Anti-Mist )
Griknot – Cave of the Lost, Cave of Underwater, Cave of the River, and Cavern of the Water Mirror (After obtaining Arena 7 Badge )
Hippopotas – Grotte des Rochers, Grotte des Sables Ardents, and Caverne du Piton (After obtaining the Anti-Mist CS )
Hoothoot – Spacious Cave, Meadow Cave, Underwater Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern (After getting CS Force )
Kadabra – Dazzling Grotto and Starry Night Cavern (After obtaining CS Anti-Mist )
Scyther – Meadow Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Piton Cavern ( Sparkling Diamond only )
Keunotor – Spacious Cave, Meadow Cave, Underwater Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Korillon – Spacious Cave, Dazzling Cave, and Starry Night Cavern
Laporeille – Spacious Cave, Meadow Cave, Snow Cave, Stalactite Cave, River Cave, Water Mirror Cave, Sunny Cave, and Glacier Cave
Lippouti – Dazzling Cave, Stalactite Cave, Starry Night Cave, and Glacier Cave
Lixy – Spacious Cave, Meadow Cave, Snow Cave, and Sunny Cave
Luxio – Spacious Cave, Meadow Cave, Snow Cave, and Sunshine Cavern (After getting Arena 7 Badge )
Machoc – Spacious Cave, Meadow Cave, Snow Cave, and Sunny Cave
Machoper – Spacious Cave, Meadow Cave, Snow Cave, and Sunshine Cave
Magby – Magma Cave, Burning Sands Cave, and Typhlosion Cavern (Sparkling Pearl only )
Magneti – Spacious Cave, Snow Cave, Stalactite Cave, and Glacier Cavern
Maraiste – Underwater Cave, Swamp Cave, and Bottomless Swamp Cavern
Marcacrin – Swamp Cave, Snow Cave, Stalactite Cave, Glacier Cavern, and Bottomless Swamp Cavern
Meditikka – Dazzling Grotto, Snow Grotto, and Starry Night Cavern (After obtaining CS Force )
Moufflair – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern (After obtaining CS Force, Sparkling Diamond only )
Skunk – Spacious Cave, Meadow Cave, River Cave, Reflecting Water Cave, and Sunshine Cave (After getting CS Force, Sparkling Diamond only )
Mr. Mime – Dazzling Cave, Snow Cave, Stalactite Cave, Starry Night Cavern, and Glacier Cavern (After getting Arena 7 Badge )
Nosferalto – Spacious Cave, Meadow Cave, Swamp Cave, Sunshine Cavern, and Bottomless Swamp Cavern (After getting CS Force )
Nosferapti – Spacious Cave, Meadow Cave, Swamp Cave, Sunshine Cavern, and Bottomless Swamp Cavern
Octillery – Underground Water Grotto, River Grotto, and Water Mirror Cavern (After obtaining CS Cascade )
Oniglali – Cave of the Snows, Cave of the Stalactites, and Cave of the Glacier
Onix – Cave of Rocks, Cave of Magma, Cave of Burning Sands, Cave of Piton, and Cave of Typhlosion
Pachirisu – Spacious Cave and Snow Cave
Ponyta – Molten Cave, Burning Sands Cave, and Typhlosion Cavern (After getting CS Force )
Psyduck – Spacious Cave, Underwater Cave, River Cave, and Water Mirror Cavern
Racaillou – Spacious Cave, Rock Cave, Magma Cave, Piton Cave and Typhlosion Cave
Rapion – Cave of Rocks, Cave of Magma, Cave of Swamp, Cave of Burning Sands, Cave of Piton, Cave of Bottomless Swamp, and Cave of Typhlosion
Rhinohorn – Spacious Cave, Cave of Rocks, Cave of Burning Sands, Sunshine Cavern, Piton Cavern, and Typhlosion Cavern
Roselia – Prairie Grotto, Swamp Grotto, Sunshine Cavern, and Bottomless Swamp Cavern
Rozbouton – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cave, and Sunny Cave
Sancoki – Cave of Underground Waters
Scarabrute – Prairie Grotto, River Grotto, Water Mirror Cavern, Sunny Cavern, and Piton Cavern ( Sparkling Pearl only )
Scorplane – Cave of the Boulders, Cave of the Swamp, Sunny Cavern, Cavern of the Piton and Cavern of the Bottomless Swamp ( Sparkling Diamond only )
Skelenox – Dazzling Cave and Starry Night Cavern
Stalgamin – Cave of the Snows, Cave of the Stalactites, and Cave of the Glacier
Tarsal – Cave of Underground Waters, Dazzling Cave, and Cavern of Starry Night
Teddiursa – Spacious Cave, Meadow Cave, Rock Cave, Snow Cave, Stalactite Cave, Sunshine Cave, and Glacier Cave ( Sparkling Pearl only )
Tentacool – Underwater Cave, Swamp Cave, River Cave, Water Mirror Cavern, and Bottomless Swamp Cavern (After getting Arena Badge 7 )
Tentacruel – Underwater Cave, Swamp Cave, River Cave, Water Mirror Cavern, and Bottomless Swamp Cavern (After getting Arena 7 Badge )
Togepi – Underground Water Grotto, Dazzling Grotto, and Starry Night Cavern
Tritosor – Cave of Underground Waters
Tylton – Spacious Grotto, Underwater Grotto, Snow Grotto, Stalactite Grotto, and Glacier Cavern
All Great Underground Pokémon – After the National Pokédex
Abo – Grassland Cave, Swamp Cave, River Cave, Reflecting Water Cave, Sunshine Cave, and Bottomless Swamp Cave ( Sparkling Diamond only )
Aeromite – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern
Arakdo – Underground Water Cave, River Cave, and Water Mirror Cave
Arcko – Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Aspicot – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern ( Glistening Pearl only )
Balbuto – Cave of the Rocks, Dazzling Cave, Piton Cave, and Starry Night Cave
Bouldeneu – Swamp Cave and Bottomless Swamp Cavern
Boustiflor – Prairie Grotto, Swamp Grotto, River Grotto, Water Mirror Cavern, Sunny Cavern, and Bottomless Swamp Cavern
Branette – Dazzling Grotto and Starry Night Cavern
Bulbasaur – Grassland Cave, Swamp Cave, River Cave, Reflecting Pool Cavern, Sunshine Cavern, and Bottomless Swamp Cavern
Cacnea – Meadow Cave, Rock Cave, Swamp Cave, Sunshine Cavern, Piton Cavern, and Bottomless Swamp Cavern
Cacturne – Meadow Cave, Rock Cave, Swamp Cave, Sunshine Cavern, Piton Cavern, and Bottomless Swamp Cavern
Cadoizo – Cave of the Snows, Cave of the Stalactites, and Cave of the Glacier
Camerupt – Cave of Rocks, Cave of Magma, Cave of Burning Sands, Cave of Piton and Cave of Typhlosion
Canarticho – Spacious Grotto, Meadow Grotto, Underground Water Grotto, and Sunshine Cavern
Caninos – Spacious Cave, Molten Cave, Burning Sands Cave, and Typhlosion Cavern ( Sparkling Diamond only )
Squirtle – Underwater Cave, River Cave, and Water Mirror Cave
Caratroc – Prairie Cave, Rock Cave, River Cave, Water Mirror Cave, Sunny Cave and Piton Cave
Carvanha – Underground Water Cave, River Cave, and Water Mirror Cave
Chamallot – Grotte des Rochers, Grotte du Magma, Grotte des Sables Ardents, Caverne du Piton and Caverne Typhlosion
Chartor – Magma Cave, Burning Sands Cave, and Typhlosion Cavern
Chenipan – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern ( Sparkling Diamond only )
Chétiflor – Prairie Grotto, Swamp Grotto, River Grotto, Water Mirror Cavern, Sunny Cavern, and Bottomless Swamp Cavern
Colhomard – Spacious Cave, Underground Water Cave, River Cave, and Water Mirror Cave
Colossinge – Spacious Grotto, Meadow Grotto, and Sunny Cavern
Coquiperl – Underground Water Cave, River Cave, and Water Mirror Cave
Corayon – Underground Water Cave, River Cave, and Water Mirror Cave
Coxyslap – Grassland Cave, Underwater Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern
Debugant – Spacious Cave, Meadow Cave, Snow Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Doduo – Spacious Cave, Meadow Cave, and Sunny Cave
Draby – Spacious Grotto, Dazzling Grotto, and Starry Night Cavern (Sparkling Pearl only )
Drackhaus – Spacious Grotto, Dazzling Grotto, and Starry Night Cavern (Sparkling Pearl only )
Écrapince – Spacious Cave, Underwater Cave, River Cave, and Water Mirror Cavern
Écrémeuh – Spacious Cave, Meadow Cave, and Sunny Cave
Embrylex – Grotte des Rochers and Caverne du Piton ( Sparkling Diamond only )
Ferosinge – Spacious Cave, Meadow Cave, and Sunny Cave
Fouinar – Spacious Cave, Rock Cave, Magma Cave, Snow Cave, Piton Cave, and Typhlosion Cave
Fouinette – Spacious Cave, Rock Cave, Magma Cave, Snow Cave, Piton Cave, and Typhlosion Cave
Floravol – Prairie Grotto and Sunshine Cavern
Galekid – Cave of the Rocks, Cave of the Snows, Cave of the Stalactites, Cave of the Piton, and Cave of the Glacier
Galegon – Grotte des Rochers, Grotte des Neiges, Grotte des Stalactites, Caverne du Piton and Caverne du Glacier
Germignon – Prairie Cave, River Cave, Water Mirror Cave, and Sunny Cave
Gobou – Underground Water Cave, River Cave, and Water Mirror Cave
Vulpix – Spacious Cave, Molten Cave, Burning Sands Cave, and Typhlosion Cavern (Sparkling Pearl only )
Grahyèna – Spacious Cave, Dazzling Cave, Stalactite Cave, Starry Night Cavern and Glacier Cavern
Granipiot – Prairie Grotto, River Grotto, Water Mirror Cavern, and Sunshine Cavern ( Sparkling Diamond only )
Granivol – Grotte de la Prairie and Sunny Cave
Hericendre – Magma Cave, Burning Sands Cave, and Typhlosion Cavern
Hypotrempe – Underground Water Cave, River Cave, and Water Mirror Cavern
Kaiminus – Underground Water Cave, River Cave, and Water Mirror Cave
Kaimorse – Snow Cave, Stalactite Cave, and Glacier Cavern
Kecleon – Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave ( Sparkling Diamond only )
Kirlia – Dazzling Cave and Starry Night Cavern
Kokiyas – Underground Water Cave, River Cave, and Water Mirror Cave
Krabby – Spacious Cave, Dazzling Cave, and Starry Night Cavern
Lainergie – Prairie Cave, Snow Cave, and Sunny Cave
Manatee – Underground Water Cave, Snow Cave, Stalactite Cave, and Glacier Cavern ( Sparkling Diamond only )
Lanturn – Underground Water Cave, Stalactite Cave, and Glacier Cavern
Slugma – Molten Cave, Burning Sands Cave, and Typhlosion Cavern
Lombre – Grassland Grotto, Underwater Grotto, River Grotto, Water Mirror Cavern, and Sunshine Cavern ( Sparkling Pearl only )
Loupio – Cave of Underground Waters, Cave of Stalactites, and Caverne du Glacier
Lumivole – Meadow Grotto, Dazzling Grotto, Sunshine Cavern, and Starry Night Cavern
Mangriff – Prairie Grotto, Swamp Grotto, Dazzling Grotto, Sunshine Cavern, Starry Night Cavern, and Bottomless Swamp Cavern ( Sparkling Diamond only )
Medhyena – Spacious Cave, Dazzling Cave, Stalactite Cave, Starry Night Cavern and Glacier Cavern
Metamorph – Dazzling Cave and Starry Night Cavern
Migalos – Grotto of the Meadow, Grotto of the Swamp, Sunshine Cavern, and Cavern of the Bottomless Swamp
Mimitoss – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern
Minidraco – Cave of Underground Waters
Muciole – Prairie Grotto, Dazzling Grotto, Sunshine Cavern, and Starry Night Cavern
Mysdibule – Dazzling Grotto and Cavern of Starry Night ( Sparkling Diamond only )
Mystherbe – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Bottomless Swamp Cavern
Natu – Spacious Cave, Dazzling Cave, and Starry Night Cavern
Water Lilies – Meadow Grotto, Underwater Grotto, River Grotto, Water Mirror Cavern, and Sunshine Cavern ( Sparkling Pearl only )
Nidoran♂ – Grassland Cave, Swamp Cave, Dazzling Cave, River Cave, Water Mirror Cave, Sunshine Cave, Starry Night Cave, and Bottomless Swamp Cave
Nidoran♀ – Grassland Cave, Swamp Cave, Dazzling Cave, River Cave, Water Mirror Cave, Sunshine Cave, Starry Night Cave, and Bottomless Swamp Cave
Nidorina – Meadow Cave, Swamp Cave, Dazzling Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, Starry Night Cavern, and Bottomless Swamp Cavern
Nidorino – Meadow Cave, Swamp Cave, Dazzling Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, Starry Night Cavern, and Bottomless Swamp Cavern
Ningale – Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Obalia – Snow Cave, Stalactite Cave, and Glacier Cavern ( Sparkling Pearl only )
Ortide – Spacious Cave, Meadow Cave, Swamp Cave, River Cave, Water Mirror Cave, Sunshine Cave, and Bottomless Swamp Cave
Osselait – Cave of the Rocks, Dazzling Cave, Cave of the River, Cavern of the Water Mirror, Cavern of the Piton, and Cavern of the Starry Night
Otaria – Underground Water Cave, Snow Cave, Stalactite Cave, and Glacier Cavern ( Sparkling Diamond only )
Ouisticram – Magma Cave, Burning Sands Cave, and Typhlosion Cave
Paras – Grassland Cave, Swamp Cave, Sunshine Cavern, and Bottomless Swamp Cavern
Phanpy – Grotte des Rochers and Caverne du Piton
Phogleur – Snow Cave, Stalactite Cave, and Glacier Cavern ( Sparkling Pearl only )
Pifeuil – Prairie Grotto, River Grotto, Water Mirror Cavern, and Sunshine Cavern ( Sparkling Diamond only )
Pomdepik – Meadow Cave, Swamp Cave, Sunshine Cavern, and Bottomless Swamp Cavern
Torchic – Magma Cave, Burning Sands Cave, and Typhlosion Cavern
Ptitard – Grassland Cave, Underwater Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern
Wobbuffet – Dazzling Grotto and Starry Night Cavern
Qwilfish – Underwater Cave, Swamp Cave, River Cave, Water Mirror Cavern, and Bottomless Swamp Cavern
Slowpoke – Spacious Cave, Meadow Cave, Underwater Cave, Dazzling Cave, River Cave, Water Mirror Cavern, Sunshine Cavern, and Starry Night Cavern (Sparkling Pearl only )
Rattata – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cave, and Sunny Cave
Rattatac – Spacious Cave, Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Rhinoferos – Spacious Cave, Cave of the Rocks, Cave of the Burning Sands, and Caverne du Piton
Sandshrew – Spacious Grotto, Grotto of Rocks, Grotto of Burning Sands, and Caverne du Piton ( Sparkling Pearl only )
Sandblaster – Spacious Grotto, Grotto of Rocks, Grotto of Burning Sands, and Caverne du Piton ( Sparkling Pearl only )
Charmander – Molten Cave, Burning Sands Cave, and Typhlosion Cavern
Saquedeneu – Swamp Cave and Bottomless Swamp Cavern
Seleroc – Dazzling Cave, River Cave, Water Mirror Cavern, and Starry Night Cavern (Sparkling Pearl only )
Seviper – Prairie Grotto, Swamp Grotto, Dazzling Grotto, Sunshine Cavern, Starry Night Cavern, and Bottomless Swamp Cavern ( Glistening Pearl only )
Skelenox – Dazzling Cave and Starry Night Cavern
Skitty – Spacious Cave
Smogogo – Swamp Cave and Bottomless Swamp Cavern
Snubbull – Dazzling Cave and Starry Night Cavern
Solaroc – Dazzling Cave, River Cave, Water Mirror Cavern, and Starry Night Cavern ( Sparkling Diamond only )
Soporifik – Dazzling Cave and Starry Night Cavern
Stari – Underground Water Cave, Stalactite Cave, River Cave, Water Mirror Cave and Glacier Cave
Tadmorv – Swamp Cave, Dazzling Cave, Starry Night Cavern, and Bottomless Swamp Cavern
Tarsal – Cave of Underground Waters, Dazzling Cave, and Cavern of Starry Night
Moletalker – Great Undergrounds
Tauros – Spacious Cave, Meadow Cave, Underground Water Cave, Rock Cave, Snow Cave, Stalactite Cave, River Cave, Water Mirror Cave, Sunshine Cave, Piton Cave, and Glacier Cave
Ténéfix – Dazzling Grotto and Cavern of Starry Night (Sparkling Pearl only )
Teraclope – Dazzling Cave and Starry Night Cavern
Terhal – Cave of the Rocks, Cave of the Snows, Cave of the Stalactites, Cave of the Piton, and Cave of the Glacier
Headtart – Meadow Cave, Underwater Cave, River Cave, Water Mirror Cavern, and Sunshine Cavern
Piplup – Underground Water Cave, River Cave, and Water Mirror Cave
Tortipouss – Meadow Cave, River Cave, Water Mirror Cave, and Sunshine Cave
Tournegrin – Grotte de la Prairie and Sunny Cave
Triopiker – Great Undergrounds
Tropius – Meadow Grotto, Swamp Grotto, Sunshine Cavern, and Bottomless Swamp Cavern
Vibraninf – Grotte de la Prairie, Grotte des Rochers, Sunny Cave and Caverne du Piton
Volcaropod – Magma Cave, Burning Sands Cave, and Typhlosion Cavern,
Voltorb – Spacious Cave, Dazzling Cave, and Starry Night Cavern
Wattouat – Prairie Cave, Snow Cave, and Sunny Cave
Ymphect – Grotte des Rochers and Caverne du Piton ( Sparkling Diamond only )
Zigzaton – Spacious Cave, Cave of the Rocks and Caverne du Piton
Sparkling Diamond-Exclusive Great Underground Pokémon
Before the National Pokédex
Armulys
Cornèbre
Live
Scyther
Moufflair
Skunk
Scorplane
After the National Pokédex
Abo
canines
Chenipan
Embrylex
Grainipiot
Kecleon
Lamantine
Mangriff
Mysdibule
Otaria
Pifeuil
Solaroc
Ymphect
Shining Pearl-Exclusive Great Underground Pokemon
Before the National Pokédex
Blindalys
Chaffreux
Chaglam
fireforever
Magby
Scarabrute
Teddiursa
After the National Pokédex
Aspicot
Draby
Drackhaus
Goupix
Shadow
water lily
Obalie
phoglour
Ramoloss
Sabelette
Sablaireau
Séléroc
eviper
Ténéfix
It should be clarified again that trainers unlock the National Pokédex after capturing all 151 Pokémon in the Sinnoh Pokédex.
Here you are, you now have the list of Pokémon present in the Great Underground Sinnoh. Happy hunting to all trainers!