Gigaton Punch (ギガトンパンチ/Gigaton Panchi) is an attack used by the Jack series of androids from the first Tekken game and onwards. In the first game's English version, the attack was called Debugger[citation needed]. As of Tekken Tag Tournament 2, Prototype Jack's version of the Gigaton Punch has him spinning his body instead of his left arm before finishing his opponent with a single left-handed straight punch.
While Jack's arm is revolving, the announcer will count the revolutions up to five with the exceptions of Tekken 6 (with the exception of the PSP version) and Tekken 3D: Prime Edition, where the announcer doesn't count at all.
Gigaton Punch has a curious form of input. While it is much easier to simply perform counterclockwise 360° directional inputs for each windup, in the original Tekken, only a 225° counterclockwise rotation is required for Jack to start the windup (e.g. hcf + u/f), however the initial move is blockable and only deals 20 damage. Subsequent rotations only require a counterclockwise roll from u to d/f. In Tekken, the first windup takes 48 frames excluding the input (6 frames minimum), and the second rotation must be delayed slightly otherwise it will not register. The following windups each take 24 frames, with the Gigaton Punch itself taking 17 frames.
The attack can be increased in power, at the cost of speed, by repeating the 360° motion up to five times before pressing 1, for 40, 60, 80 or 199 damage (or 128 in Tekken). These hits are unblockable, and the last hit is an instant KO. Note that the move only hits once, the damage values shown above are for each specific move.
The cycle can be performed up to eight times, at which point Gigaton Punch will not only do monstrous damage, but be unblockable; although the maximum damage is already guaranteed after the fifth cycle. The move can be canceled at any time by simply not punching. If the user performs more than five rotations, Jack will automatically continue to spin his arm three more times and cannot block.
From Tekken 2, the first windup was made quicker, taking only 28 frames, or 24 if the Gigaton Punch is performed after the first rotation. The directional input was also slightly simplified to HCF or b,d/b,d,d/f,N for the initial windup. Also in Tekken 2, Jack-2 received a simplified version of the initial move, its input being b,b+1 to start the motion and an additional 1 to perform the punch, but to perform the unblockable versions the rotations are still required after the initial b,b+1. Prototype Jack and later Jack models did not receive this simplified version, although Jack-2 returned with the simplified move in Tekken Tag Tournament.
The stage 1 Gigaton Punch was one of several broken moves in the first two games, with Jack being able to juggle if the punch was blocked. The ability to juggle from it was removed in Tekken 3.
Prior to Tekken 6, the spinning also notably tracked and adjusted its user to a sidestepping or sidewalking opponent. While the unblockable versions no longer tracked since Tekken 6, the attack gained a hidden hit box from the user's back that would launch an opponent.