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{{Non-playable Character| Title = Jack-4
| Image = [[Image:Jack-4.jpg|200px]]
| Caption = A Jack-4 robot.
| Origin = [[G Corporation]]
| Age = Unknown (most likely the same for all of them)
| Occupation = Kamikaze assassin (all)
| Appearances = [[Tekken 5]] (opening)
}}
'''Jack-4''' is a non-playable character in the ''[[Tekken (series)|Tekken series]]'' of fighting games.  This version was mass-produced and sent to attack [[Heihachi Mishima]] and [[Kazuya Mishima]] at [[Hon-Maru]]. Apparently, this model has a self-destruct feature, as shown in the ''[[Tekken 5]]'' opening movie, where a Jack-4's head opens up to reveal an internal time bomb. The massive explosion wasn't enough to kill Heihachi, but the blast did however throw him several miles as well as free [[Jinpachi Mishima]] from his imprisonment. 
There is no Jack model, not even Jack-4, participating in ''[[Tekken 4|The King of Iron Fist Tournament 4]]'', and Jack-4's successor, [[Jack-5]], takes his place in ''[[Tekken 5|The King of Iron Fist Tournament 5]]''.
[[Image:Jack-4s_and_Heihachi.jpg|thumb|left|[[Heihachi Mishima]] and the Jack-4s.]]
{{-}}
Several Jack-4's also appear in the [[Scenario Campaign]] Mode of [[Tekken 6]], fighting for the [[G-Corporation]].
{{Jackbots}}
== [[Character Relationships]] ==
*Developed by [[Jane]].
*Attacked [[Kazuya Mishima]] and [[Heihachi Mishima]] at [[Hon-Maru]].
*Attacked [[Raven]], possibly in an attempt to discard the only eye witness.
*The explosion caused by the Jack-4s freed and resurrected [[Jinpachi Mishima]].
*The explosion caused by the Jack-4s was thought to have killed [[Heihachi Mishima]], but Heihachi managed to survive.
[[Category:Non-playable characters]]
[[Category:Russian]]
[[Category:Power Fighting]]