he is in the cavern zone, sleeping in the hot spring.
There is a big hole in the middle of the cavern zone. If you walk around the edge and look very hard you will see a ramp going into the hole.(Just follow snorlax's snoring.)
In the cavern zone
Snorlax doesn't have a password.
If you mean phanaphy he is in the cavern zone after u become friends with snorlax
the cavern zone
In the Cavern Zone, where Bastiodon's Block Barrage
Befriend Buneary, and he'll be waddling around the entrance to the Meadow Zone.
It took forever for me to find him, but I found him next to Machamp's obstacle course.
magnezone: get all three magnemites, found in crates in the cavern zone, then the magnezone will appear.
Porygon is behind a the long ramp. But first you need to go up the ramp and to the right to defeat blastoise. Then you turn a switch and you can go get Porygon. Togekiss is where bronzor blocks you. Once you find Porygon and get the secret word, you can find togekiss. Togekiss is just beyond a rope swing thing. Snorlax is in the hot spring of the cavern zone
in the volcano zone
haunted zone
When you are far into the game, you will see Lavana with a Magmortar and you will have to capture it.
The magma zone
By the water