is a fascinating and rare piece of Nintendo history that most fans outside of Japan have never seen in person. Developed by Capcom and released in April 2011, it is a Japan-exclusive "medal game" or "medallion game" that transforms the cooperative platforming of the Wii original into a high-stakes, slot-machine-driven arcade adventure.

They finally reached the castle, a towering fortress of gilded ledgers and spinning slot-machine reels for doors. And inside, on a throne made of negative interest rates, sat Bowser. Except he wasn’t a turtle. He was a massive, jittering TeknoParrot error message:

Unlike traditional Mario platformers, the goal is to win medals rather than just reaching a flagpole. New Super Mario Bros. Wii Coin World

Teknoparrot has become the gold standard for emulating modern PC-based arcade hardware. Since Coin World runs on hardware similar to the Nintendo Switch (NVIDIA Tegra based), getting it to run requires a specific setup.