A quick Google search will net you hundreds of results for these files. However, downloading random files from "ROM dumps" can be risky.
Let’s be direct: Sony and the cheat device creators (MAD Catz / InterAct) no longer support the GameShark. No one is making money from PS2 cheat discs today. However, copyright law does not care about "abandonware." gameshark ps2 rom verified
Our advice: If you own the original GameShark disc, creating a personal backup ISO (a verified dump of your own disc) is defensible under fair use in some regions. A quick Google search will net you hundreds
Troubleshooting: If it freezes, you need a newer PCSX2 build (1.7.0+) or a more recent verified patch. Our advice: If you own the original GameShark
If you are downloading a ROM/ISO, you want to ensure it matches the Redump database. Redump.org is a preservation project that ensures disc images are accurate 1:1 copies of the original retail discs.
Warning on "Xtreme" / "Platinum" Editions: Be very careful downloading files labeled "GameShark Xtreme," "Platinum," or "Day 1." These were often third-party hacks or unofficial compilations distributed on shady forums in the mid-2000s. They are rarely "verified" and frequently contain corrupted save files or, in rare cases, malware embedded in PC-side tools.