Zanzōken (残像拳, literally "Image Remaining Behind Skill" or "Double Shadow Fist") or Afterimage Technique is an ability to move so swiftly that an image of the technique's user is left behind. Most often it is used to dodge an incoming attack and get behind the opponent to perform a counter-attack. Its usage is not limited to just counterattacks, though.
Zanzoken was created by Korin and first seen used during 21st Tenkaichi Budokai when Jackie Chun fought Goku. In an early English dub of Dragon Ball, he calls this technique "The Devil's Afterimage", but originally there was no 魔 ("Ma") character that marked all "devil" techniques.
Jackie Chun is able to perform a "Tajū Zanzōken" (多重残像拳, literally, "Multiple Afterimages/Multiple Images Remaining Behind Skill"), where he spins around his opponent, leaving a lot of afterimages of himself. In this form, it is hard to tell which one is the real Jackie Chun. Goku adapted this technique in the 21st Budokai and was able to produce more afterimages than Jackie Chun, in an attempt to fool him with his own attack.
Later almost every character learns Zanzoken, and its usage is not even marked by anything, so it meets the same destiny as flight. In Dragon Ball GT, Goku and Vegeta used this to distract Omega Shenron while attempting fusion dance.
- 残 (Zan) = To remain behind
- 像 (Zō) = Image
- 拳 (Ken) = Technique