Walkthrough
At the summit of Mt. Ember, you will find the Legendary Pokemon known as Moltres. Moltres is one piece of the Kanto Legendary Bird Trio, being a dual Fire/Flying Type Pokemon. It will be found at Level 50, knowing the moves Fire Blast, Agility, Endure, and Flamethrower. Because Moltres is a Fire Type Pokemon and the only move it knows that actually causes physical damage to your Pokemon is also Fire Type in nature, Rock Type Pokemon and Water Type Pokemon do especially well against it. Since Moltres isn't the strongest Legendary Pokemon you will find in the Kanto Region, stick with using Ultra Balls to try to capture it.