One important aspect of Fire Emblem games are the sidequests. Providing extra experience, items, and sometimes even characters, they remain a useful facet of Fire Emblem. This brief guide is intended to tell you how to achieve all the sidequests and give you little tidbits of help on how to achieve that.

Chapter 7x: Finish Chapter 7 in 15 turns or less.
Pretty much self-explanatory. There's some good experience you can get from chapter seven, so don't rush it. It should be pretty easy to kill off Heintz, though, especially with Lucius. I recommend moving Lucius nearby, and just keeping him there until you want to kill off Heintz. Remember, once Heintz is dead, the chapter ends.

Chapter 13x: Visit the northern village.
Trust me, you want this one. Merlinus is extremely useful and I can't imagine finishing the game without him. The requirement itself isn't that hard; just send one of your stronger troops on a temporary diversion to the northern village and visit it. It should be easy enough.

Chapter 16x: Save at least one of the neutral soldiers.
This chapter is useful because it provides you the only dark magic user in the game, Canas. To get this chapter, you need to make sure that at least one of the soldiers locked in the cell with Raven survives. This is relatively easy; the soldiers all have vulinaries they can use if they get hurt, and the area they are in is pretty cleared of troops by the time you get to it. They are a bit battle-hungry, though, so if for some reason you can't keep them in line, you might want to run by and rescue them. Also, don't be afraid to use Raven or Lucius to protect them; Raven's not the best but he can definately provide them aid, and Lucius is pretty good as well, if a bit fragile to physical attacks.

The two forces you will have to worry about the most are the mages in the enclosed room near you and the calvary that appears at the bottom as reinforcements. Assuming you brought along Merlinus, you should probably have someone down there defending him which will probably soak up the calvary. The mages can be dealt with rather easily by Lucius, who you've just earned. He's got the upper-hand of the magic trinity and he's pretty good at magic-to-magic battles. The mages will target the soldiers first, though, so watch out and make sure they don't steal your spotlight.

If you manage to save them, you'll be pretty happy with the rewards. Not only will they unlock the extra chapter, they will also give you various rewards depending on how many survive. If only one survives, you get a Mine. If two survive, you get a Light Rune. If you save all of them you receive a Red Gem. So saving these guys is probably in your best interests.

Chapter 18x: Finish Chapter 18 in 15 turns or less.
Another 15 turns or less chapter, but this one might actually cause some trouble for you. It's fog of war and there are certainly a fair share of enemies lurking about, so be careful. Don't send all your good units charging off, either; some pirates appear at the corner where you started about ten turns in, and they will kill Merlinus if you don't have anyone defending him.

Just don't rush it and things will be fine. I recommend taking mounted units here, since they will get the job done most efficiently.

Chapter 22x: Recruit Hawkeye + earn 700 or more EXP.
The first requirement is easy. Just take your lord down to the south-east end for a quick chat. By the time you get him down there, Hawkeye will appear. Seeing as Hawkeye is an excellent character and seeing that its not hard to recruit him, getting him onboard should be no problem.

The other requirement is what will be a bit harder. While you can get 700 EXP from the level, you'll need to stop Pent from stealing it all. Hell, he'll destroy the entire enemy single-handedly if you let him, which is fine if you want an easy day, but not if you want the extra chapter (and, hell, all the EXP).

In order to stop Pent from robbing you blind of EXP, you'll need to rescue him. Seeing as you'll have difficulty getting to him in time with most of your units thanks to the desert terrain, you'll need to bring along a flying unit. You may use any one of them you like, although I prefer Heath the most. Make sure your character is strong enough to survive a couple of hits, because as soon as you take Pent out of the picture the enemies will start focusing on you. Just do a quick drive-by and pick him up and fly back. From there, just progress normally. Make sure you wait through for all the reinforcements, though, because that will help you gain the EXP goal.

Chapter 26x: Recruit Nino + Have Nino talk to Jaffar.
To save Nino, you need to perform a quick rush down the right-hand side of the map to where she's located. Remember to bring a door key or you'll find yourself stuck outside waiting. Nino can handle herself alright, but wait too long and she will get herself killed. So be careful on that one.

From there, you need to get her to talk to Jaffar. Seeing as Nino is pretty fragile at this point, I recommend rescuing Jaffar with a mounted unit and running over to where Nino is before dropping him. Be careful of Ursula as well; she's got an incredible range and her staff does do some damage.

If you have a second door key, rescuing Jaffar should be a bit easier. If for whatever reason you can't rescue Jaffar, than just do the typical trick and grab Nino, run her over, drop her and let her talk, then grabbing her again. If you can't rescue Nino either... well, that's going to be tough. Try to keep the two protected by some level of a phalanx of stronger units until they can meet up in the middle. Be mindful of the enemies in Zephiel's room; they might pop down and put an end to your show.

Chapter 29x: Automatic.
Seriously, you can't miss this one. If, somehow, you do, than you just need to realize that Intelligent Systems really, truly hates you and you should probably find some other game to play.