Instruct: Classify a given review into positive or negative sentiment.
Query: Must have, sometimes

I bought this because I was told you absolutely need this to play. And for some games that is true. Not for most of the ones I have though. So yeah, you need it for the second controller you had to buy, but I don't know why they don't package them right. Two controllers and 2 nunchuks in the box with the system. They know you need them anyway.