It's going to be psuedo-random, though, and on something as primitive as the NES the ability to make a psueo-random number look truly random is limited.
If you could determine what seeds the placement of the enemies, it could be used to your advantage (similar to the Tetris portion of the NWC using the score from SMB as the "random" number seed).
Also, on something like the NES that can't natively handle multiplication and division, it is more likely that the random number generator used is just a single table that uses an integer seed as an input.
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If you could determine what seeds the placement of the enemies, it could be used to your advantage (similar to the Tetris portion of the NWC using the score from SMB as the "random" number seed).
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