Ok so I, after much research, have been able to read the gyro data of the new wii motion plus peripheral with the arduino microcontroller. With this code and the code previously developed for the wii nunchuck (here), we are able to create a 6 DOF IMU for under $40. Thanks Nintendo! Best of all, everything is I2C so only 2 analog inputs (A4 and A5 needed for the wire library) are needed to read 6 sensors and no ADC conversion happens on the arduino board.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.