.CARC File Extension

Compressed .NARC file used by Nintendo DS ROM games; may contain graphics, level information, and other game data; used for reducing the size of the data required to run the game.

CARC files can be extracted from .NDS files using NarcTool, Taxahan, or another Nintendo DS ROM editor. From here, they can be decompressed to NARC files, which can be browsed and edited with tools such as Narc Explorer.