Donkey Kong (NES)
Donkey Kong doesn't really need much of an introduction. Despite missing an entire level (the so-called "pie factory"), the NES port is otherwise faithful to the arcade original.
Lurking within the ROM are a handful of objects that never appear anywhere. The first two seem to be early versions of the handbag and parasol; the hat appears in the arcade version, but not the NES port; and the bouquet of flowers doesn't appear in any version, though it probably would have served the same purpose (bonus points) as the other items.
Sprites of Mario and Pauline sitting, possibly meant for a different ending.
PRG0 vs PRG1
There are more code differences...
In the original PRG0 version, Mario cannot move at all when the D-pad is held diagonally. In the more common PRG1 version, the controller reading code was improved so that the first direction pressed has priority: if the D-pad is rolled from up/down to diagonal Mario will not start walking, but if the D-pad is rolled from left/right to diagonal he will not stop walking.
Animal Crossing Release
The controls have been slightly modified so the player can press Up and Down to switch between options at the title screen. The original game only allowed toggling with Select, which was changed to Z for the version seen in Animal Crossing.
To commemorate the 25th Anniversary of Super Mario Bros., a limited-edition red Wii was released. In Europe, this came with a modified Virtual Console version of Donkey Kong pre-installed that follows the arcade version more closely (rather than, you know, actually releasing the arcade version). This new version also received an official release on the 3DS in the United States during the last few months of 2012, via a limited-time Club Nintendo promotion.
Shortly after the game's release, the ROM was extracted from its WAD container and distributed online, at which point it was discovered that Original Edition is nothing more than a hack of the original retail ROM...and a rather sloppy one at that.
The copyright date adds "-2010", with "1981" changed to "1983" as that was when the Famicom version was released. The text "CO.,LTD." was removed, and "MADE IN JAPAN" was moved over one space. Before being soft-patched, the 3DS version lacked the copyright symbol and showed a copyright year of 2008, possibly indicating the originally planned release was to coincide with the 25th Anniversary of the Famicom version.
|NES||3DS Original Edition pre-patch||Original Edition|
50M (the "pie"/cement factory), commonly omitted from Donkey Kong ports of the 1980s due to memory limitations, is present.
Climbing Donkey Kong
Donkey Kong now carries Pauline up the ladders to the next level, much like the arcade version.
|The Donkey Kong series|
|Arcade||Donkey Kong • Donkey Kong Jr. • Donkey Kong 3|
|Atari 8-bit family||Donkey Kong|
|NES||Donkey Kong • Donkey Kong Jr. Math|
|Game Boy (Color)||Donkey Kong • Donkey Kong Land • Donkey Kong Land 2 • Donkey Kong Land III (Prototype) • Donkey Kong Country|
|SNES||Donkey Kong Country • Donkey Kong Country 2 • Donkey Kong Country 3|
|Nintendo 64||Donkey Kong 64 (Prototype) • Diddy Kong Racing|
|Game Boy Advance||Donkey Kong Country • Donkey Kong Country 2 • Donkey Kong Country 3 • Mario vs. Donkey Kong (Prototype) • Diddy Kong Pilot (Banjo-Pilot Prototypes) • DK: King of Swing|
|GameCube||Donkey Konga • Donkey Konga 2 • Donkey Kong Jungle Beat|
|Wii||Donkey Kong Country Returns|
|Nintendo DS||DK: Jungle Climber • Mario vs. Donkey Kong 2: March of the Minis (Prototype) • Mario vs. Donkey Kong: Minis March Again! • Diddy Kong Racing DS|
|Wii U||Donkey Kong Country: Tropical Freeze|
|Adobe Flash||DK: King of Swing - Hurling for Distance • DKC 3: Barrel Blastapalooza|