Fire Emblem: Shadow Dragon/Chapter 17

Star and Savior "The League had routed Hollstadt's knights and recaptuerd most of the kingdom, but there was still the castle to deal with before Altea would be free; the mage-dragon Morzas remained entrenched within its walls. Unlike General Camus who preceded him, Morzas had been a cruel warden, slaughtering many innocent Alteans at the slightest provocation. Marth roiled to think such a monster still sat upon his noble father's throne."

Preparation
Pick your favorite units, Beck might be a good choice also. Nothing much to do, promote some units if possible. Use some items. Trade some stuff. When ready, start. A thief also helps good.

The beginning part of this stage should look familiar...it's from the Prologue!

Begin
Your first targets are the treasure chests to the left. Use some strong units to get there. Leave some units around. Beck is also useful here because he can attack the thieves from the start. Note that the bishop to the right will spam fortify whenever any enemy units are damaged even the slightest bit.

Use your strongest units to defeat the Manaketes and use your others to defeat the regular enemies. By the time you reach the treasure room, Beck should have cleared the place. Note that you should NOT have started fighting in the eastern part of the map. However, the ENTIRE left side should be cleared. Your thief should be rushing in and getting the treasures.

After this, take the time to mobilize all your troops to the right. Then, use an archer to take out the ranged bishops/archer on the extreme right. (Note: you should get a VIP card...refer to Secrets for more information.)

When ready, bust the door open and meet the reinforcements. Starting the turn you open the door and lasting for about 5 turns, a knight and a cavalier will spawn. One tactic for dealing with this is to use a mage, a healer, and a strong physical unit (ie a paladin), taking the brunt of the damage with the physical unit while the mage does damage from a distance and the healer keeps everyone happy.

At the end, get ready to destroy the boss. He is hapless against long-ranged attacks, so you can easily kill him using this trick.

Check out the secret shop behind the throne (again, Secrets. When done, seize the gate.

"Thus Altea was liberated. Its people, ragged from years of Dolunian tyranny, scrambled to the castle and flocked beneath its walls, eager to celebrate what, for many, would be remembered as the happiest days of their lives. They clapped each other on the back, laughed; and when Marth, their prince, appeared up above, they saluted their hero with a thunderous cheer: "''Glory to Marth, our prince of light! Glory to our star and savior!" "Marth smiled down at his people and waved. The great commander's last victory of the day was commanding his tears not to flow.''"

Save the game and continue. Note that if you have less than 15 characters here, you will get into 17X Gaiden chapters