Mega Man Star Force 2: Zerker x Saurian Cheats :
TiTle Screen Star Marks and Final Boss Xa Ver
Accomplish something in-game to recieve these different icons on your New Game/Continue screen. Getting them all will also result something new to appear on the screen when you start your game. You'll also be able to fight the Xa Version of the Final Boss at the end of the game which has 4000 HP once you obtain Rockman [Megaman] Star, S Comp Star, M Comp Star, G Comp Star, and OoPart Star.