Many pirated versions cannot access the updated online database, meaning you’re stuck with basic monsters and miss out on the legendary ones.
If a friend owns the game, they can share their library with you for free!
Writing a blog post about "free downloads" for paid games like can be tricky. While many people search for that, downloading pirated versions often leads to malware, broken save files, or missing features—especially for a game that relies on an online database to "generate" monsters.
The DX version includes a high-speed mode. Many unofficial downloads have "speed bugs" that make the game unplayable. How to Get Monster Rancher 1 & 2 DX Legally (and Cheaply)