Downloading ROM files for games you do not physically own is generally considered a violation of copyright law. While emulators themselves are legal, the unauthorized distribution of game data remains a grey area that major gaming companies actively combat.
: Team-DSX planned to sell the game on a CD for approximately 1,980 yen (~$18.70). However, the game could only be played by transferring the data to a DS flashcart halfelf tentacle assault ds rom link