I don't think I need to explain the cleverness behind these harmonicas, but in case there's anybody out there that isn't familiar with the NES and its intricacies, I'll copy/paste a quote here for you because I care am lazy. ...
Recollect the HarmoNESica? A short refresher, afterwards: it's what happens when you've got a copy of Super Tecmo Bowl, a Slot Companion harmonica, and a.
Yep, it's harmonica hardware crammed into a gutted-out NES cartridge. It's supposed to play just like a regular free-reed instrument, except you're blowing down the butt of a broken game instead of a slab of rectangular plastic or steel ...