Krystal Original Fan Music by ZTPrapheephat
The first song is Nova Krystal by ZTPrapheephat.
ZTPrapheephat has made two songs either inspired by Krystal, or titled after her. They are electronic in nature and don't resemble any Star Fox music, but it's cool to see more Krystal popping up. Both songs are available for download.
The other song is Krystal's Dreams by ZTPrapheephat.