If one is interested there is nearly 100 years now of sophisticated noisy signal recovery techniques.

Magnetic storage media operates on the principal of this hack at baseline! https://en.wikipedia.org/wiki/Partial-response_maximum-likel...

The same idea can apply here as GBA ROM material would be highly biased. Majority vote wastes a lot of information.

One interesting application of taking the value appearing in majority, or more generally taking the median, is to remove noise or people from a sequence of several photos taken from the same point of view. This idea is to superimpose all the photos, and for each pixel, you simply keep the median [1].

[1]: https://patdavid.net/2013/05/noise-removal-in-photos-with-me...

It's fairly common in data recovery though, just keep on reading disk images and running quora until something passes the checksum and see if it works out. Better still if there are higher level checksums (for instance across a file that has a signature) for further verification. Also used in some aerospace applications.

I wondered about it for film scanning, specifically with a fan project like 4K77 where they're dealing with potentially damaged theatre prints rather than pristine masters— having multiple of them and being able to use that to eliminate scratches and so on would potentially save a ton of time on manual fixing in post.