Fun fact: Macronix used to make chips to defeat the NES lockout system for unlicensed cartridges [1]. I don't know if they made the ROMs or cartridges as well, but it seems plausible. I think their partnership with Nintendo started during the N64 era, with Toshiba and Sharp making most of their ROMs before that.
Similarly, Argonaut Games, the company that worked with Nintendo to produce StarFox and the SNES SuperFX chip. Their first interaction with Nintendo was when "Argonaut submitted a proof-of-concept method of defeating the Game Boy's copyright protection mechanism."
Another fun fact: Argonaut later evolved the very same SuperFX chip into the https://en.wikipedia.org/wiki/ARC_(processor), which is used in, among [many] other things, Intel's infamous Management Engine. You very likely have an Argonaut core in your computer.
[1] https://www.google.com/patents/US5004232