If you want to build an expansion team around hitting, then use the Local ballpark. If you want to build an expansion team around pitching, then use the Panrika ballpark.
View Major League players at Created Players menu:
Press Up two times, Down two times, Left, Right, Left, Right, 1, 2 at the Created Players menu.
Alvin Lockhart’s batting stance and pitching form:
Press Right, Left, Up, Down two times, Right two times, Up two times, Left, Down, Left at the main menu. Alvin’s batting stance and pitching form will be available in the shop.