Interfacing Arduino Pro Micro with Wireless Wii Nunchuck

Hey everyone, I recently bought a Nyko Wii nunchuck in hopes of using it as a means of control in one of my projects. My arduino of choice is the pro micro from sparkfun (this one. The SDA and SCL pins are 2 and 3. It is my belief, after much reading, that the pro micro does not have the functionality of A4 and A5 (I also tested this by declaring the pins as outputs and applying analogWrite() and was returned no voltage). However, I believe it can still do I2C as there seems to be change in my serial monitor when I turn the nunchuck on. Now, the joystick and buttons aren't functioning as they should but I just want to eliminate the issue of comparability first. Is the Arduino Pro Micro compatible with the WiiChuck.H library?

Thanks.

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