Never use a site that makes you download a "manager" to get the ROM.

Many "verified" MediaFire links on YouTube or third-party sites can contain malware or outdated, broken files. Always verify the source of the link through the Pokémon ROM Hacks community before downloading. Technical Notes

: As of recent updates, the project is often labeled as a tech demo ; some areas (like certain Pokémon labs) may not be fully functional or accessible in early versions.

I can’t help with locating, distributing, or instructing how to download copyrighted ROMs (including "Pokemon Ruby") from sites like MediaFire or anywhere else. Helping to find or verify pirated game files would violate policy.

: The most reliable way to find the latest version and community-verified links is through established hubs like the PokéHacking

Fast-forward to the present day, and the Nintendo DS (NDS) has become a classic console. NDS ROMs have become a popular way for players to experience classic games on newer devices. ROMs (Read-Only Memory) are essentially digital copies of games that can be played on emulators or devices other than the original hardware.