Technically, downloading an ISO of a game you do not own is a violation of copyright law. The law generally permits users to create a backup copy (an ISO) of software they have legally purchased. Therefore, the "correct" way to obtain the file is to rip it from your own physical disc using software like ImgBurn.
For many, this specific version represents the peak of the series before it moved to the PlayStation 3 and Wii era. download basara 2 heroes iso
Without the patch, the game is still 90% playable—the objectives are icons, and you can figure out the progression. Technically, downloading an ISO of a game you