No changes to Final Fight's invisible characters, though I only tested that and Street Fighter, which worked without issues. I will note that the collection itself either is unable to create or detect saves.
Version: ppsspp-v0.9.6-209-gff10d0b 64bit
OS: Windows 8.1
Video chipset: AMD Radeon HD 8400
Processor: AMD A6 5200 2.0Ghz quad core.
Version: ppsspp-v0.9.6-209-gff10d0b 64bit
OS: Windows 8.1
Video chipset: AMD Radeon HD 8400
Processor: AMD A6 5200 2.0Ghz quad core.

