Square Enix described one of the summons from Final Fantasy XIII. Snow can summon Shiva Nix and Shiva Styria, which can fight on their own or transform into a motorcycle.
One of the screenshots lists the moves Snow can do in motorcycle mode. Hold up + circle to Wheelie Rush. Down + circle is for Icicle Toss and left/right + circle is for Air Edge. Triangle is reserved for Diamond Dust, a requirement for every Final Fantasy Shiva summon.
Players can actually drive the Shiva motorcycle. Don’t want to go Road Rash on PSI-COM sodliers? Without any directional commands the circle button sets the motorcycle to Auto Drive.