I'm not sure exactly what you mean by "prototype video game for Wii." Could you clarify?
Is there a game called "Prototype" for Wii? No, the game Prototype (and its sequel) were released on PS3, Xbox 360, and PC, but not Wii.
Are there prototype/unreleased games made for Wii? Possibly, but prototype builds are typically not released to the public, so information is scarce.
Do you want to know how to make a prototype game for Wii? That involves homebrew development using tools like devkitPro and libraries such as libogc. It's complex but resources exist online.
Please provide more details so I can give a precise answer!
