After you first walk in mt ember if you go right you should see the secret entrance the rockets made for you it only appears after getting the national dex. Defeat the rocket grunts then go inside the secret entrance use the HM Strength to help you navigate through the cave once your at a part where you can go down or right go down that way you can reach the area where the Ruby is.
look up the question what if there isn't a secret entrance on mt ember, basically its the same thing.
Mt ember.
you get it in Mt. Ember
it is in Mt. Ember
On top of mt ember.
Moltres is on the summit of Mount Ember. Mount Ember is on Knot Island in the Sevii Island.
mt ember on one island
Moltres is at the top of Mt. Ember.
the ruby is in Mt. Ember you have to defeat the 2 rocket grunts in front of the entrance
Moltres can be found on top of Mt Ember.
One Island by Mt. Ember
Moltres is at the top of Mt. Ember.