CHARACTER INFORMATION:

This Rosalina amiibo has not been officially announced but appears in-game in the amiibo party mode of Mario Party 10.
The Super Mario amiibo figures
that released alongside Mario Party 10 all have red bases similar to this one and Rosalina is one of the game's 9 supported amiibo figures so perhaps she will be part of a 2nd Wave of Super Mario amiibo?
Stay tuned for more information!