i only know how to in hg and ss. i think you have to beat all leaders + elite 4.
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
defea t the elite 4
you have to go north of cerulean city and go left until you see the grass. then you have to surf down and left and theres cerulean cave. i think you have to get the kanto badges first though.
there is no cerulean cave in ruby
There not in cerulean cave.
no mewtwo is in cerulean cave and articuno is in seafoam island
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 cannot catch Mew in the Cerulean Cave because it can't be found there.
You can find Mewtwo in the back of Cerulean Cave.