I recently bought an M3 Lite and I've still got my old DS and I found it difficult to find out which games offer good multi-cart multiplayer. So Here's my list of good multiplayer games: Advance Wars: Dual Strike Animal Crossing: Wide World Big Brain Academy Bomberman / Bomberman Land Touch! Elite Beat Agents / Osu! Tatakae! Ouendan Gekitou! Custom Robo Jump Super/Ultimate Stars Magnetica Mario Kart DS Meteos Metroid Prime Hunters New Super Mario Bros. Teenage Mutant Ninja Turtles Tetris DS Zoo Keeper I have to say I've had the most fun with Animal Crossing: Wide World. It's a little dorky but I love messing about in other people's towns, trading items and patterns or just running around and talking to the people in their town. It's has WFC which helps but I've enjoyed it the most playing locally with friends. Please suggest any games that you've had fun playing multiplayer or any fun multiplayer experiences you've had and I'll update the list as new posts come in. I'm especially interested in titles with co-operative multiplayer.