Yacht Club Games has put together a video showing the functionality of the Shovel Knight amiibo, due for release in Europe on December 11th, and North America on January 8th.
Within the clip, it shows different amiibo modes including co-op, and it also gives you a glimpse into the custom options available including colour changes and skins.
You can check it out below:

Game grumps shovel Knight amiibo Commercial is much better tbh
Plague Knight Amiibo coming soon?
I was definitely already getting him, but now… I’m even more determined to.