In a public event (and livestream), Krystal was announced today as the newest available fighter in the fan-made Super Smash Flash 2! The livestream is still up showing both the initial reveal reaction and a handful of example matches, showing off her abilities.
Krystal's moveset includes an aim-able sniper rifle, a staff-based shield, lots of kicks and staff attacks, and throwable grenades. Her design is a combination of her Adventures, Assault, and Command styles. She uses voice samples from both Star Fox Adventures and Star Fox Assault.
You can check out the playable game on mcleodgaming.com. It doesn't look like Krystal is playable yet, but hopefully she will be released with the next update.