Super Mario World 2: Yoshi's Island was ported by Nintendo Entertainment Analysis and Development to the Game Boy Advance as Yoshi's Island: Super Mario Advance 3 with added features. The game featured no changes to its basic formula besides that voice samples from Yoshi's Story were used. There were two major additions, however: six new levels called "Secret levels" could be unlocked after beating the game,and the Mario Bros. mini-game that appeared on all the Super Mario Advance series. If a player completes the game and gets 100 points on all 60 levels in the game, a secret ending will occur. Like its two predecessors, Super Mario Advance 3 had generally positive reviews. It sold 1.6 million copies in the US and was re-released in 2006 as a Player's Choice title. The Game Boy Advance version was included in the list of other Game Boy Advance games (and NES games) for the 3DS Ambassador Program, an initiative from Nintendo thanking the early adopters of the Nintendo 3DS after its worldwide price drop in August 2011, in response to lower than anticipated sales figures.