Famicom Mini Vol. 21 brings the original Japanese Super Mario Bros. 2—known in the West as 'The Lost Levels'—to the Game Boy Advance. Originally released on the Famicom Disk System, this sequel is famous for its brutal difficulty and complex level design. Players can choose between Mario, who is faster, and Luigi, who jumps higher but is harder to control. Introducing elements like the Poison Mushroom and wind gusts, this title is often called the ultimate challenge for platforming fans. This GBA port perfectly preserves the 8-bit aesthetic and unforgiving gameplay of the 1986 classic.