^ Or they could simply allow cross over use of items. Perhaps with a warning when changing styles. Switching styles will break levels anyway. Might as well allow the out of place sprites in different styles so things don't simply disappear. Kinda sucks Amiibo features only work in the original style.
It would be quite cool to be able to mix styles and abilities within the same level. Transport pipe from one style to a different one could make some interesting levels.