Giant Chasm

The Giant Chasm is a location found in Unova where Kyurem can be found here as a level 75 deep inside. This area mainly specializes in having many Pokémon from the previous generations such as Tangela and Ditto. It is also famous for being the only place in the Unova region that houses Ditto.

History
It is stated that whoever enters the Chasm, surely disasters will follow. The residents from Lacunosa Town refer to it as the "hole" where a dangerous monster lives.

Outside

 * Tangela
 * Swellow
 * Golbat
 * Solrock
 * Lunatone
 * Drifblim
 * Absol
 * Audino (Rustling Grass)
 * Emolga (Rustling Grass)
 * Crobat (Rustling Grass)
 * Tangrowth (Rustling Grass)
 * Mamoswine (Rustling Grass)

Inside Cave

 * Piloswine
 * Golbat
 * Sneasel
 * Delibird
 * Solrock
 * Lunatone
 * Jynx
 * Boldore
 * Excadrill (Dust Cloud)
 * Basculin
 * Seel
 * Dewgong (Rippling Water)
 * Poliwag
 * Poliwhirl
 * Poliwrath (Rippling Water)
 * Kyurem (Interaction in Inner Cave)

Plains

 * Clefairy
 * Piloswine
 * Ditto
 * Solrock
 * Lunatone
 * Metang
 * Audino (Rustling Grass)
 * Metagross (Rustling Grass)
 * Clefable (Rustling Grass)
 * Mamoswine (Rustling Grass)

Items

 * Star Piece (x2)
 * Comet Shard
 * Max Elixir
 * Max Potion
 * Revive
 * Carbos
 * TM13 (Ice Beam)
 * Full Heal
 * Max Revive
 * TM03 (Psyshock)
 * Nugget

Trivia

 * This cave is very similar to the Cerulean Cave from Pokémon Red, Blue, Green, and Yellow versions, as it features very high leveled Pokémon and a very powerful Legendary Pokémon at the end.
 * Wild Pokémon in the plains are the highest level regular Pokémon found in Unova. They range from level 50-65.
 * It is said that disaster is said to befall trainers who approach the Giant Chasm, which may explain why Absol can be caught here.