Grandia Digital Museum

Go to the title screen for the Grandia All-Star Pro Eating Contest minigame and press Up, L, R and A simultaneously on the second controller. This takes you to the character select screen and highlights player 2's currently selected character with a blue arrow.

On the title screen for Gadwin's baseball minigame - first press Left, then Right, then press X 12 times. If you did it right, you'll hear Gadwin's "hmph!" sound. If you start the game, you'll see that Rapp doesn't pitch the ball. What you can do now is toggle the throw type (indicated by the counter above Rapp) with Left and Right, and press B to trigger a throw. The C button is used to swing the bat. No lives are taken away if you miss a throw, essentially making this a hidden "practise mode" for the minigame.