to make it easy go east from vermillion city [sorry for spelling] there is a snorlax and you just cant talk to it so you have to get the kanto radio card from a person on the first floor and the go and play the Pokemon Flute but it is in a secret spot so go about a few lines from the middle and it will wake you can battle it or run then go to digglets cave and go there to pewter city hoped that helped
Get a better game :)
Beat misty then go to cerulean cape
By walking there from Saffron City or through Rock Tunnel from Cerulean City.
just beat red then go to cerulean city then go to the cave
just go to the cerulean city cave.
you go to cerulean city and beat misty.
to get to cerulean city, you need 8 johto badges and you need to beat the elite four. then you get an ss ticket from prof. elm, which will take you to vermilion city in kanto. then go south and you will end up in cerulean city.
it is north of cerulean city
beat the elite four and then you can go to the kanto region and you have to beat Brock, then get though Mount Moon to get to Cerulean city
Go up the bridge in the northern part of Cerulean City and beat all the trainers where the bridge gets off. Travel east (or otherwise to the right) and you will see Misty.
Get a better game :)
beat Giovanni in the game corner in cerulean city
you find it in the cerulean cave behind cerulean city after you beat all the Kanto gym leaders
you catch mewtwo in the cerulean city cave after you beat the Pokemon league
You get the poke flute from a man at the raidio tower in Kanto after you clear the power plant in Kanto and beat the Cerulean City gym leader.
Mewtwo is inside the Cerulean Cave in Cerulean City. You have to beat the entire game in order to go inside and catch it
Beat misty then go to cerulean cape