The cave entrance collapsed in that game, so it can't be entered. Sorry.
curmen cave
It should be in the Cerulean cave
On Pokemon SoulSilver, to find mew two in the cerulean cave, you need to go to the bottom floor.
Mew can be found in Pokemon gold by finding Pikachu and going up its buns and Mew is located next to the Kidney, but for a special treat Mew 2 can be found by looking by the colon
after you defeat blue go to Prof oak and he will move the trainer out side the cave in cerulean and find your way through their and you will find it at level 70
You have to trade it from RBY
you find him in Pokemon yellow red and blue in the cave by cruelean city you have to be champion to get in the cave iam a spambottttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
after you get all 18 badges and defeat the Pokemon league go to cerulian cav and mew two will be there
You can find mew.. AFTER FINSHING THE POKEMON LEAGUE.. do some tasks GO TO THE CAVE NEAR ..MYSTY's GYm.. ITS THE TRICKY PART INSIDE ...... after surfing YOU CAN SEE MEW.. BETTER GET THE MASTER BALL :))
beat the elite four 12 times and you will find her in the cerealian cave
um listen Pokemon fire red does not have mew only mewtwo and that's in cerulean cave
Mew 3 doesn't exist and the only Mew-anything you can find is mew2 at the back of Cerulean Cave.