Codes cheats for Fire Emblem - Shadow Dragon

Fire Emblem - Shadow Dragon - Game cheats, tips and tricks for Nintendo DS

Gaiden chapters:
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Successfully complete the indicated task to unlock the corresponding Gaiden
chapter:

Chapter 6x: Have less than fifteen characters at the end of Chapter 6
Chapter 12x: Have less than fifteen characters at the end of Chapter 12.
Chapter 17x: Have less than fifteen characters at the end of Chapter 17.
Chapter 20x: Have less than fifteen characters at the end of Chapter 20
Chapter 24x: Have Chiki dead and no falchion.

Units:
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Successfully complete the indicated task to unlock the corresponding unit:

Alan (Paladin): In Chapter 16, visit the village to the left with Marth.
Note: You cannot recruit Samson after recruiting Alan.
Astria (Hero): In Chapter 13, talk with Midia. Note: Appears as an enemy.
Athena (Myrmidon): In Chapter 6x, visit the village with Marth.
Banutu (Mamkute): In Chapter 7, visit the village with Marth.
Beck (Shooter): In Chapter 13, visit the village with Marth.
Chainy (Commando): In Chapter 16, talk with Marth. Note: Appears as an enemy.
Chiki (Mamkute): In Chapter 19, talk with Banutu. Note: Appears as an enemy.
Daros (Pirate): In Chapter 2, talk with Marth. Note: Appears as an enemy.
Ellis (Cleric): Unlocked automatically in Chapter 24.
Est (Pegasus Knight): In Chapter 18, talk with Marth. Note: Appears as an enemy.
Etzel (Sorcerer): Successfully complete Chapter 17x without killing him.
George (Sniper): In Chapter 9, Visit the village with Marth.
Gordon (Archer): In the last part of the tutorial, talk with Marth. Note:
Appears as an enemy. Also automatically unlocked at start in Hard mode.
Horus (General): Successfully complete Chapter 12x without killing him.
Hymir (Warrior): In Chapter 20x, talk with Marth and complete the chapter.
Jake (Shooter): In Chapter 11, talk with Sheeda. You must also visit the
village where Anna is in the same chapter. Note: Appears as an enemy.
Kashim (Hunter): In Chapter 2, talk with Sheeda. Note: Appears as an enemy.
Linda (Mage): In Chapter 11, visit the village with Marth.
Machis (Cavalier): In Chapter 4, talk with Rena. Note: Appears as an enemy.
Maria (Cleric): In Chapter 10, talk with Marth. Note: Appears as an enemy.
Marich (Mage): In Chapter 4, visit the northern village with Marth.
Minerva (Dragon Knight): In Chapter 10, talk with Marth after already
recruited Maria. Note: Appears as an enemy.
Nagi (Mamkute): Successfully complete Chapter 24x.
Navarre (Myrmidon): In Chapter 3, talk with Sheed. Note: Appears as an enemy.
Riff (Priest): In Chapter 1, visit the western village with Marth.
Roger (Knight): In Chapter 8, talk with Sheeda. Note: Appears as an enemy.
Samson (Hero): In Chapter 16, visit the village to the right with Marth. Note:
You cannot recruit Alan after recruiting Samson.