There were many reasons why the PS2 version didn't sell that well:
- It was released near the end of the PS2's life, people were becoming interested in what was then the next gen. PS3 was being released in the next month
- It was released in Februrary 2007 not long after Zelda TP was released, lots of action/adventure fans might have bought Zelda instead
- Many could have been turned off by the art style and the fact you play as a goddess/wolf
As for the Wii Version:
- Released in June 2008, same time as SSBBrawl. Probably hurt sales
- A PS2 Port
- Wasn't advertised at all








