Twilight Princess Nintendo DS Preview Trailer
500 of these special Nintendo DS cartridges were given out at E3 2005 to promote the then-Gamecube game, The Legend of Zelda: Twilight Princess, which contained a brief, heavily compressed trailer.
Despite being visually and audibly lacking to a nearly humorous degree, it was still rather impressive to have that kind of content playing on the relatively underpowered Nintendo DS system, not even a year after its release, no less. The trailer also borrows sound effects from Ocarina of Time, inserting them at key points in the trailer, marking this trailer as slightly different from the many similar versions released by Nintendo that year.
Due to its limited production and quirky nature, The Legend of Zelda: Twilight Princess Preview Cartridge is one of the most highly sought after DS cartridges out there.