Exploration of the “GAMETEXT.bin.txt” file as well as some unused audio in Star Fox Adventures reveals that even after the transition from Dinosaur Planet to Star Fox Adventures was complete, there were some modifications to the story, especially for the final hour or so of gameplay. Krystal has several speaking parts in the Krazoa Palace that imply that she was released earlier and worked alongside Fox for some time.

Also, the original reason for collecting Krazoa Spirits was apparently not to fix the planet, but simply to save Krystal. In one modified cutscene, Fox refuses to leave Sauria until he rescues Krystal, implying that only the Spellstones were originally needed to fix Sauria. Andross appears to have been an afterthought as he is hardly ever mentioned in the source code, this implies that the final enemy was General Scales or perhaps even the Krazoa.

Finally, towards the very end, additional unused audio has Krystal showing far more attraction to Fox than shown in the final game. Krystal’s audio also implies that Fox expressed a desire for Krystal to join the Star Fox team, something that otherwise wasn’t revealed until Star Fox Assault demos began to surface. It would be easy to speculate the reasons for these changes, but there just isn’t any supporting information about them, so I leave it up to you.

Unfortunately, there is no accompanying audio of Fox during these unused conversations. Perhaps Krystal’s voice acting was done first, only to be redone later.