As part of a surprise announcement by Nintendo, the 3DS would receive a large price cut (80 dollars for the US) a mere six months after the 3DS was released worldwide. As compensation for anyone who has a 3DS before the price cut point (August 12th), Nintendo would be giving away 10 NES games and 10 GBA games to anyone who has accessed the 3DS shop channel before August 12th. So far, Nintendo confirmed that on the NES side, Super Mario Bros, Donkey Kong Jr, Balloon Fight, Ice Climber and The Legend of Zelda would be available as well as five unknown titles. Along with Super Mario Advance 3: Yoshi’s Island, Mario Kart: Super Circuit, Metroid Fusion, Wario Ware, Inc.: Mega Microgame$ and three unknown titles, Nintendo of America customer service also confirmed that Super Mario Advance 4 (Super Mario Bros 3) and Kirby and the Amazing Mirror would be avaliable. While these two games were not mentioned in the original press release given by Nintendo, NintendoWorldReport contacted the Nintendo of America customer service and they recieved a confirmation of the announcement. The NES games are set to be avaliable to early adopters of the 3DS from September 1st while the GBA while the GBA games will befully distributed by the end of the year.
Source: (Nintendo World Report)