To find the cavern zone you will need to go to the meeting place where the tree house is and then the gate keeper should be cranidos if your not sure talk to cranidos an he should tell you that its the cavern zone.
hope this helped :).
the cavern zone
Around the Cavern Zone
after you get the second word from togekiss, talk to him in the hot spring at 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.
he is in the cavern zone, sleeping in the hot spring.
If you mean phanaphy he is in the cavern zone after u become friends with snorlax
Yes,you haft to go to cavern zone and talk to her and play chase with her
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.
When you are far into the game, you will see Lavana with a Magmortar and you will have to capture it.
Break all the crates and you'll find a Big Berry, the one who you might've given to Snorlax or Panphy in the Cavern Zone. Then, give it to Quagsire.