So this is pretty cute. If you tap any of the 40 Amiibo available, you can unlock that character's costume in Yoshi's Woolly World. As you can see in the above trailer, the Mega Man Amiibo is supported.
They don't show the Mega Man pattern in action, but it sounds like we'll have the opportunity to play through the entire game as a Yoshi-Mega Man. That is crazy cool. Hopefully we'll see what it looks like soon.
Yoshi's Woolly World is due this fall in North America; June 25th in Europe.