Ember Trail is near Mt. Ember, where Moltres is. Ember Trail is also located on One Island.
Ember is a small part of glowing wood, which is still burning. If it is burning for a while it is a piece of coal. It is found near a campside fire, that is still glowing.
ARTICUNO: Seafoam Islands. You must surf from Fuschia City's bank and push boulders into the water to control the current. Then, fall through a hole and fight him/her. ZAPDOS: Power Plant. Surf on the water from near Rock Tunnel. Go down and work through the maze. MOLTRES: Mt. Ember. Go to One Island and go to Ember Trail. Keep going north until you reach Mt. Ember. At the top is Moltres. One Island is in the Sevii archipelago. ARTICUNO: Seafoam Islands. You must surf from Fuschia City's bank and push boulders into the water to control the current. Then, fall through a hole and fight him/her. ZAPDOS: Power Plant. Surf on the water from near Rock Tunnel. Go down and work through the maze. MOLTRES: Mt. Ember. Go to One Island and go to Ember Trail. Keep going north until you reach Mt. Ember. At the top is Moltres. One Island is in the Sevii archipelago.
At the top of Mt Ember near one island. (Moltres is wild so save before you battle him).
The first password you will get from 2 team rocket grunts at mt ember (after you get national dex). Second is in dotted hole at island 6 when the man working for team rocket who meets you near the sapphire
you will get larvesta, a bug/fire type pokemon.
Island 6 near the edge
A fire ball with the health number near it
it is in the desert near relic castle
There's no 3 legendary lion in Pokemon FireRed. But, you can catch 3 legendary bird. First, go to Seafoam Island, looking around, you'll find lv50 Articuno. Second, go to Mt. Ember, go to the top of Mt. Ember (at first island), you'll find lv50 Moltres. Third, go to Power Plant (near Rock Tunnel). Looking around, you'll find lv50 Zapdos.
When you enter the area there is a hiker and boulders to the left, and the members are together to the right near the cliff thing. ~M
It's on one island its in the north at Kindle Road you will need Surf to reach there, the spa is the cave near two black belt trainers.
Plenty of Ponyta can be found south of Hearthrome City, or, if you have the National Pokedex, you can find many fire Pokemon in the valcano near the resort area.