Do you mean to be able to get out? To get out you have to go past nugget bridge and then make a left. Battle those trainers, then there will be a house. Go inside ther will be a man named bill but he will be a pokemon. Talk to the pokemoin then after you do as he says. Talk to him once more, he will give you a ticket. Then in cerulean city the house with a police man in front, will be open. Then you can get out but you have tobattle another rocket. Then you will be able to get out.
If you mean the cave, you never get out. You find MewTwo in there,but it is hard to explain in words. Lookfor a walk through on YouTube.
Sorry if i don't have the answer you were looking for.
After beating the Pokemon League, you still can't go to the Cerulean Cave. To be able to enter you have to get the National Dex by catching 60 different types of Pokemon and showing your PokeDex to Professor Oak, also you have to do the Ruby Sapphire side quest in the Sevii Islands and beat the Pokemon League once more when their Pokemon are stronger and different. By then you will be able to enter the Cerulean Cave that contains Pokemon levels 50-60 and Mewtwo Level 70 at the Bottom floor of the Dungeon.
There are various Pokémon available to capture inside the mansion in FireRed version. For example, there is Koffing and Grimer.
inside the rocket warehouse on the fifth island.
Go to vermilion city and find the Pokemon fan club its a green roofed building has a sign near it. Go inside and talk to the chairman listen to his story about his rapidash then after he's done he gives you a bike voucher go back to cerulean city and go into the bike shop give the voucher to the cashier to get a free Bike!
Go past Nugget Bridge [ north of Cerulean City ] and then go east. Keep going until you see a house, go inside and talk to the poke'mon [ who is actually Bill ] and then press A in front of the computer. Next, wait until Bill comes out [ as a human ] and then tal to him again. He will give you a ticket to the S.S. Anne and then go back to Cerulean City. Go to the house where the police man is, he should'nt be in front of the door anymore. If he is, then beat the gym leader, Misty then go back to the police man, he should let you inside the house. Once inside, go through the hole in the back of the house. Once outside again, talk to the Team Rocket Grunt and beat him in a battle. [ He should have a Machop and a Drowzee. ] Last, head south to Vermillion City.
inside cerulean cave near cerulean city.
You can nly get inside it after beating the game and inside it at the end you can catch Mewtwo.
Beat the sevvi islands and the Pokemon league. Then go to Cerulean city and get to Cerulean cave. Once you're inside, navigate your way through the cave. Mewtwo is at level 70. Be sure that you are ready to give it all you got. ^_^
Oooh! There is a legendary Pokemon residing within... It has been told about only in myths.... This is a psychic Pokemon that you'll probably need the masterball to catch. It is MEWTWO!!!!
Inside the Cerulean Cave. HMs Required: Surf
well u get by catching a poliwhirl and trading it to a guy in cerulean city located inside a house . youll get it whatever level your poliwhirl is.
Mewtwo is inside the Cerulean Cave in Cerulean City. You have to beat the entire game in order to go inside and catch it
in firered and leafgreen, after u beat the elite four, go to cerulean cave. mewtwo is inside.
Inside Seafoam Islands.
you have to beat the elite four. and, you have to rescue Lorelei on four island. And inside the cave lies... MEWTWO!
After beating the Pokemon League, you still can't go to the Cerulean Cave. To be able to enter you have to get the National Dex by catching 60 different types of Pokemon and showing your PokeDex to Professor Oak, also you have to do the Ruby Sapphire side quest in the Sevii Islands and beat the Pokemon League once more when their Pokemon are stronger and different. By then you will be able to enter the Cerulean Cave that contains Pokemon levels 50-60 and Mewtwo Level 70 at the Bottom floor of the Dungeon.
its inside the mansion