Porcus

Zwolf is one of the 12 Dark Warlords.

In Fire Emblem: Seisen no Keifu, little is said about the Dark Warlords, but they are all fought in the Final Chapter near Barhara and eventually defeated, including Zwolf.

In Fire Emblem: Thracia 776, Zwolf is fought in the Final Chapter. The character that becomes Zwolf is Rifis if Rifis is either dead or not recruited.

Seisen no Keifu
Zwolf is one of the weaker Dark Warlords, being a Thief Fighter, and can be beaten fairly easily. He will steal all of a character's gold if he hits a character, but since you fight him in the final part of the Final Chapter, gold is no longer an issue.

Base Stats
|Thief Fighter |30 |80 |20/16 |N/A |20 |25 |4 |18 |16 |7 |Sword


 * Items: Brave Sword
 * Skills: (Pursuit), (Steal), Critical
 * Leadership Stars: 0
 * Gold: 6000
 * Holy Blood: None
 * Sword Mastery Rank: A

Thracia 776
Zwolf is the weakest of the Dark Warlords you have to fight, but you should try to defeat him in one turn or he might steal something from a character, and he has 20 speed and 16 build, so be prepared for this.

Base Stats
|Thief Fighter |20 |40 |14/9 |16 |14 |20 |9 |12 |9 |7 |Sword


 * Items: Berserk Sword
 * Skills: (Steal), (Ambush), Continue, Wrath
 * Leadership Stars: 0
 * Movement Stars: 2
 * Pursuit Critical Coefficient: 0
 * Sword Mastery Rank: A