they are the same thing.
... Cerulean City, the cave on the other side of the water.
Unknown Dungeon was the name of a cave in Red, Blue and Yellow version that is located northwest of Cerulean City you would need Surf to reach their the cave is now called Cerulean Cave.
Lickitung appears in Cerulean Cave also known as Unknown Dungeon.
Pokemon Mystery Dungeon 1: Red Rescue Team/ Blue Rescue Team Pokemon Mystery Dungeon 2: Explorers of Time/ Explorers of Darkness
Yes you can, he is found at the end of the mystery dungeon in Cerulean City after you defeat the elite 4.
After you defeat the elite 4 as well as the champion Gary the only new area that opens up is the mystery dungeon in Cerulean city. In this dungeon, you can find rare and high level pokemon.
Yes Cerulean cave is Unknown Dungeon. In Red/Blue/Yellow it was Unknown dungeon. they just changed the name in firered and leafgreen because it was near cerulean city or something. hope this helps!
Different story more Pokemon Like Palkia Dialga.
Next to Cerulean City. You must have beaten the Pokemon League, and have restored power to the trade thingy on One Island to get in.
Mewtwo must be migrated from 3rd Generation. In 3rd Generation, it is found in the Unknown Dungeon, in Cerulean City, in Pokemon Fire Red and Leaf Green.
Mewtwo must be migrated from 3rd Generation. In 3rd Generation, it is found in the Unknown Dungeon, in Cerulean City, in Pokemon Fire Red and Leaf Green.
Defeat the Elite 4, after that go to Cerulean Cave and just explore. Bring some health items and powerful Pokemon because the Pokemon there are level 50 and higher.