| Problem | Cause | Solution | |---------|-------|----------| | PSP shows "Corrupted Data" | CSO named incorrectly or in wrong folder | Rename to SONICR2.cso (max 8 chars + .cso) inside /ISO/ | | Game stutters during boost pads | Compression level too high | Recompress at level 4 or use ISO | | Black screen after Sega logo | Incompatible ISO mode | Switch CFW driver from M33 to Inferno | | Ad-hoc multiplayer desync | One player has CSO, other has ISO | Both must use identical file format (both CSO or both ISO) | | CSO won’t load on PSP Go | Internal storage slower than M2 card | Move to internal memory (fast) or use ISO |

Sonic Rivals 2 is notorious for graphical glitches on early emulators. Use these settings to fix them:

Beyond the standard race, the sequel introduced "Free Play" and "Battle Mode." Battle Mode includes six sub-types like Knockout, Capture the Chao, and King of the Hill.

The sequel expanded significantly on the original's foundation: Sonic Rivals 2 (PSP) Guest Review - SuperPhillip Central

Sonic Rivals 2 CSO for PSP: Everything You Need to Know is the high-octane sequel to the original head-to-head racing platformer developed by Backbone Entertainment and published by Sega. Released exclusively for the PlayStation Portable (PSP), it refined the "rivalry" mechanic, adding more characters, diverse game modes, and a deeper story.