Zack Zero - Z-Shifting (speedrun trick) @DukeSetz
Zack Zero - Z-Shifting (speedrun trick)  @DukeSetz
Uploaded July 2013 | Updated September 2026, 2 weeks ago
You can briefly move toward the foreground after getting hit by certain attacks, letting you bypass ceilings and some obstructions that you normally would not be able to. For this trick to have much effect, Infinite Jumping is required since pressing a direction after Z-shifting will move Zack back to his normal position.

Infinite Jump: [ youtube.com/watch?v=no94fys5y5I ]

First, you need to be in Fire form, and you need to find an enemy with an attack that knocks Zack over. These attacks temporarily paralyze Zack as he falls to the ground and runs through an animation to get back up. I'm not certain of the exact method, but falling onto the enemy's attack, pressing jump twice, and holding to trigger Surf will sometimes let Zack float out toward the camera.

This may also involve movements such as holding the opposite direction of the attack, or taking damage from both the fall onto the enemy and the attack. I believe this is related to the glitch where you regain your double jumps after taking damage.

Bump Jump: [ youtube.com/watch?v=8SZUkdkD3JM ]

During the Surf, you should be unable to control Zack since he's still supposed to be cycling through the damage animation, but toward the end of the Surf, you should be able to switch forms and do an Infinite Jump to leap past ceilings and such.


This is likely a case of Zack getting stuck in between the left and right directions due to the attack, and he's designed to move in the direction he's facing. The Surf being a constant form of velocity that simply moves Zack forward without further player input, it lets you move in a way you weren't intended.


The only major area of note I've found with this trick is in the final level, "On Time?", where the ceilings prevent Zack from just Infinite Jumping out of the level. When encountering a Captain, you can take damage from him to skip the fight, one floor, and another fight with a General.


Overall, it's a decently useful trick that probably saves about 20 seconds in the final stage, but it's sadly rather specific as well as difficult to perform. Most areas of the game will feature ceilings that you can just Infinite Jump through, so the use of Z-shifting is somewhat limited. That said, in such an easy game to speedrun, this is a nice little trick to cap off the last level.
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DukeSetz |

Zack Zero - Z-Shifting (speedrun trick)

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