Super Mario Advance is a remake of Super Mario Bros. 2 developed by Nintendo Research & Development 2 as a launch of the Super Mario All-Stars remaster for the SNES, and also contains a remake of the original Mario Bros. game. Advance includes many few features, gameplay mechanic changes, graphical and audio enhancements, and stylistic and aesthetic alterations from the All-Stars edition, with the most significant changes being the addition of the enemy Robirdo, a robotic Birdo, replacing Mouser as the boss of World 3; the addition of the "Yoshi Challenge", in which players may revisit stages to search for Yoshi Eggs; a new point-scoring system; multiple hit combos; enlarged sprites; and digital voice acting.