On the Today's Game screen, press L Button, R Button, L Button, R Button and you'll hear a confirmation tone, and the cursor will disappear. For fast mode, press L Button, A Button, Z Button, R Button, B Button, A Button, L Button, L Button. For slow mode, press L Button, L Button, B Button, A Button, L Button, L Button. Press Start and the cursor will reappear, and you can begin play with game speed enabled.