The prototype Wiimote and Nunchuk seen above are old news. We've featured them many times, and even talked about one selling at auction. Today's news is about what's inside the Nunchuk, as it differs from the version Nintendo actually released.
@hard4games I know someone who got a prototype nunchuk who opened it up. He sent me these photos. Notice that round disc? I believe this is a rumble motor, the same used in GBA games pic.twitter.com/XFGh7NBN3T— Dan Moore (@moorecore) September 10, 2019
As you can see, it appears the prototype Nunchuk actually had a rumble motor in it. Why Nintendo yanked this for the final design is unknown. Hopefully someone brings this up with Nintendo in a future interview!