If Greg is into those mini-games in Match of the Millennium, it might be worth giving The Last Blade a shot in that collection too. You'll need to buy them as two unlockables, and they're less interesting, but it's got a baseball slugging mini-game, and another one I forget (was it skydiving?).
That game itself isn't as good as Samurai Shodown Pocket 2, but Last Blade has a second campaign for most of its characters once you beat it with everyone once.