You can buy an original cartridge on eBay or at retro gaming conventions. Prices range from $15 (loose, dirty) to $60 (boxed with a weird manual). Insert it into a top-loader NES (AV Famicom) for the best stability. Avoid using it with a Retron 5; the emulation layer usually crashes on the pirate menu.
To play the 190-in-1 NES ROM, you will need: 190 In 1 Nes Rom 18