The Game & Watch Gallery series is composed of collections of some of Nintendo's original Game & Watch titles in two styles: original and remade with characters from the Super Mario Bros. series. Known in Japan and Australia as the Game Boy Gallery series, five installments have been released, each for various incarnations of Nintendo's portable systems, like Game Boy, Game Boy Color, Game Boy Advance. In many cases, the mini-games ported onto these collections exist in their graphically upgraded forms as well as their original ones. Also, the titles often feature actual galleries explaining the history of the Game & Watch system and the various games released for it. The first four titles in the series also feature Super Game Boy borders which mimic the original Game & Watch casing designs. The series was known as Game Boy Gallery in Australia and is one of the very few Australia-only localizations with the series in Australia now known as Game & Watch from GBA onwards. Nintendo has begun releasing individual titles via its DSiWare services for the Nintendo DSi, DSi XL, and soon the 3DS.
Source: Wikipedia, "Game Boy Gallery", available under the CC-BY-SA License.