Excerpt from interview with Takeshi Iizuka:
Q: How did the idea of creating NiGHTS for Nintendo’s new console come along?
A: I’ve been interested in making this sequel for as long as I can remember, and the moment seemed perfect to start working on it. This game is ideal to take advantage of the Wii controller’s potential.
Q: Do you intend to take the inspired NiGHTS experience to other platforms?
A: So far, this new NiGHTS game is a Wii exclusive.
Magazine scans with screenshots of the game can be found here
Translated Interview, here