WWF No Mercy / GAME HISTORY

WWF No Mercy Save Bug: What Revision A Changed for Cartridge Owners

Contemporary owner research documents WWF No Mercy cartridges that erased progress and THQ’s replacement programme.

By Patchlo Editorial Desk · Published October 29, 2026 · Sources checked October 29, 2026

Scope: Original Nintendo 64 releases and documented US replacement history. This is not a current THQ exchange offer or a guarantee about a cartridge sold today.

What players lost

Martin Nielsen’s account at NESWORLD/64scener describes the original US cartridge problem and dealings with support. The reported losses could include created wrestlers, unlocked content, career progress and earned currency. Starting again meant repeating matches and purchases, rather than merely changing a display setting.

The reader who prompted this question recalled owning an early copy and exchanging it. That fits the documented replacement history but does not authenticate the revision of a cartridge currently offered for sale.

The first response and the replacement

The account describes an initial reset procedure that did not permanently prevent the problem. The US replacement process required the relevant receipt and packaging, and the replacement is discussed as Revision A/1.1.

1. Distinguish an original affected copy from a documented revised cartridge.
2. Use the source’s revision photographs and descriptions rather than a seller’s “fixed” claim alone.
3. Do not assume an old label, replacement shell or listing title independently proves the software revision.

What the history does not settle

The checked material does not settle whether every revised US cartridge reached retail or only replacement channels. European exchange details are not confirmed here. Nor does this record establish a code-counter explanation or show that creating a particular wrestler caused the erasure. The useful historical distinction is the original reset advice versus the later replacement—not a newly invented universal repair.