Are all glitches from the original games still present on the NES Classic Mini?
Some of the games that are reissued on the NES Classic Mini have well-known and well documented glitches, such as jumping through a wall in Super Mario Bros..
These glitches are exploited to save time in speed runs.
Are these glitches still present in the versions of these games that are included on the NES Classic Mini?
Best Answer
Most likely yes.
The main reason is they gain nothing fixing them, and they're extremely hard to fix.
You can expect all the development hardware and software are over 30 years old.
Just because they have a ROM, it doesn't mean they can fix it. Fixing bugs of this type via ROM hacking is non-trivial.
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