I built a robot to win at Mario Party minigames

What it does

I built an autonomous robot that physically plays Mario Party minigames using computer vision and hardware actuation. Then I took it to OpenSauce 2025 and challenged Ludwig to button mashing. So I spent a weekend in December building a proof of concept: 3D-printed mounts for the solenoids to press the Joy-Con buttons, basic computer vision to detect the shapes, and using a capture card to record the gameplay. Once I got it working I made a quick video and left it there. I’d been watching nearly all of the featured creators at OpenSauce for years, so when exhibitor applications opened for 2025’s event, I knew I wanted to submit something. Most projects at maker fairs are showcases, but I…from joshmosier.com

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