User blog comment:TheMaskCollector/The Weird and Mysterious Amiibo/@comment-25476555-20150209204625/@comment-1400578-20150209212807

Yeah, but that amiibo doesn't come out until March 20th. It could be that, since you were moving the gamepad at the time, it got close enough to an amiibo to register its presence, but was moved away before it could identify it, which triggered the error message. That's just a guess though.