If you got the good ending or better on a previous save then if you do a new game+, when you can start blitzing again, playing the Abes can be won in a tournament, from there, if you win Trading Privilages (sp?) you can trade someone for Tidus, who is known as the Star Player i think. As for what skills he has, I dunno, but I doubt its Jecht and Sphere shot since their techniques from X, probably corkscrew and volley shot since they're the only move available in X-2 blitz