Actually, there was once a time long long ago that a game named "Dinosaur Planet" was in production. So the story went like this:
Nintendo: "Well, we promised a Star Fox game at launch, but we decided not to work on it."
Rare: "Well that's a darn shame."
Nintendo: "Here's moneyz. Make Krystal a fox and change Sabre into Fox Mcloud. Also, make Krystal teh sexyz. And be sure to make Krystal a pathetic side character, and give Fox her weapon. Then, give Fox all of Krystal's scenes! =D"
Rare: "lol okayz."
http://www.youtube.com/watch?v=f20Ck6tNnS4