Seafloor Cavern

The Seafloor Cavern (Japanese:  Seabed Cavern) is a location in Hoenn, deep beneath the water of. After surfacing inside the cave, there is a maze of tunnels to the deepest part, where the super-ancient Pokémon resides.

In order to reach it, the undefined must use and. Additionally, in Pokémon Emerald, a Team Aqua Grunt will block access to the deeper rooms from the entrance until after Team Magma is defeated at the Mossdeep Space Center. Inside, is required for navigation; there are also smashable rocks, which cause  to be required for navigation in the Generation III games, but not the Generation VI games.

In Pokémon Ruby and Omega Ruby, the cavern is the home of, who slumbers at its deepest part; in Pokémon Sapphire, Emerald, and Alpha Sapphire, the cavern is the home of , who slumbers at its deepest part (in Pokémon Emerald, Groudon slumbers within the Magma Hideout, deep inside of the caverns of Mt. Chimney).

In Pokémon Ruby, Sapphire, and Emerald, the stolen Submarine Explorer 1 is parked at the bottom of the underwater area underneath the Seafloor Cavern. In Pokémon Omega Ruby and Alpha Sapphire, the stolen Submarine Explorer 1 is parked at the shore in the entrance chamber of the Seafloor Cavern.

In the deepest part, Maxie or Archie will attempt to control the super-ancient Pokémon using the orb he stole from Mt. Pyre. However, the Pokémon does not respond well, and instead will escape, causing harsh sunlight/extremely harsh sunlight or rain/heavy rain throughout eastern Hoenn; in Emerald, both rain and harsh sunlight appear, and they change after the player takes enough steps (counting actions like using ).

Generation III
No Pokémon can appear by walking at the entrance or Groudon/Kyogre room.

Pokémon Ruby




Pokémon Sapphire




Pokémon Emerald




Pokémon Omega Ruby




Pokémon Alpha Sapphire




In Pokémon Generations
The Seafloor Cavern briefly appeared in a vision by Courtney in The Vision. Although the interior of the cavern wasn't shown, the top was depicted as a rocky island protruding from the water. At this rocky island, Primal appeared and attacked Team Magma.

It properly appeared in The Cavern, where it was shown that Team Aqua also visited it. Archie, Shelly, and three s went deep inside the cave and found a room where was resting. Archie woke it up with the Blue Orb, after which Kyogre transformed into Primal Kyogre and started to go on a rampage throughout the Hoenn region.

In the Pokémon Adventures manga
The Seafloor Cavern served similar purposes in the of Pokémon Adventures to its purpose in the games. Members of both Team Magma and Team Aqua traveled there using Submarine Explorer 1 fitted with a component produced by the Devon Corporation. They aimed to awaken and, respectively. and used a  to  to the cavern.

The Seafloor Cavern was erroneously called the "Cave of Origin" in the Chuang Yi translations of Pokémon Adventures volumes 19, 20, and 21.

Trivia

 * The Seafloor Cavern makes an appearance as a backdrop in the Alola Photo Club in.

In other languages
Tiefseehöhle Caverna Abisal Caverne Fondmer Antro Abissale かいていどうくつ 海底洞窟