Zack & Wiki isn't a true 2 player game, but a second player can operate another wiimote looking for clues while the main player navigates the main character. It's a funny, quirky game you both might enjoy.
I'm not sure how Endless Ocean local 2 player works, but from what I have seen co-op online is possible. Maybe someone that has a game can tell if there is a split screen option for two players. Might be another good option.
I am also fond of Carnival Games, if she can enjoy skeeball, shooting hoops, strength testers, ring tosses, then this game could also be fun. Great light-hearted carnival action.