You're looking for a save file link for Sonic Riders: Zero Gravity on PS2. Here's some helpful information:
Physical Memory Cards: For those playing on original hardware without a way to transfer files, sellers on eBay offer official memory cards pre-loaded with 100% completed saves for the entire Sonic PS2 library, including Zero Gravity. What a 100% Save File Unlocks sonic riders zero gravity ps2 save file link
The Full Gear Gallery: Every Extreme Gear, from the Blue Star to the high-end legendary boards. You're looking for a save file link for
Saves are available in several formats depending on your hardware or emulator: sonic riders zero gravity ps2 save file link
Watch for 100% completion showcases on YouTube; creators like