The reason fans specifically search for the version is rooted in nostalgia and voice acting quality. The Spanish dubbing industry in the late 20th century was phenomenal, often giving characters more "soul" than the original Japanese or English versions. Key reasons this dub is legendary:

In many regions, the Spanish dub was the only way to experience the show before the internet made subbed content widely available. Why "Hotfile"?

Since Great Mazinger lacked a consistent official DVD release in many Spanish-speaking countries for years, these file-sharing sites were the only way to preserve the version. Today, these links are long dead, but the search terms persist in old forum threads and "abandonware" archives. Where is it Now?

While you won't find active links on anymore (it was shut down years ago), the legacy of Great Mazinger (Gran Mazinger) in Latin America remains massive. Here is a deep dive into why this specific version is so sought after by collectors. The Legend of Gran Mazinger