If you're referring to what the guy infront of Cerulean cave is saying, the Great Achievement is bringing the Sapphire and Ruby to the man in the research center on One Island.
there is no cerulean cave in ruby
yes you need all 16 badges to get into cerulean cave.
You can access Cerulean Cave in SoulSilver after you get all 16 gym badges (Johto and Kanto).
once you beat the elite four go to island 1 and talk to the guy in the big Pokemon building/Pokemon center.He will then give you a mission to find 1ruby and 1 sapphere once you do that you wil be able to go to cerulean cave
Capture Mewtwo
If you're referring to what the guy infront of Cerulean cave is saying, the Great Achievement is bringing the Sapphire and Ruby to the man in the research center on One Island.
there is no cerulean cave in ruby
no mewtwo is in cerulean cave and articuno is in seafoam island
There not in cerulean cave.
uh...... if you didn't go into the dark cave in johto and the cave east to cerulean and north of the electric plant. P.S don't mistake the cave in cerulean city. not the cerulean cave!!!!!!!!!!!!!
yes you need all 16 badges to get into cerulean cave.
Cerulean Cave, nor Cerulean City, was not in Pokemon Emerald. In RBY, it opens up after beating the Elite 4.
The cerulean cave is behind that man that says u need all badges to get through. It is in cerulean city
you have to beat the elite four, and get the national dex. then go to cerulean city, go past the nugget bridge, and surf on the water. there is a cave,and its cerulean cave
You cannot catch Mew in the Cerulean Cave because it can't be found there.
You can get all the Pokemon in the cerulean cave where you find celebi below the cerulean cave.