davex released an unofficial version of the Neo Geo emu MVSPSP with cheat support.

Release notes:

Strictly speaking, since NJ added support to the Universal BIOS (UNIBIOS), MVSPSP has been with cheat support. But UNIBIOS support requires raster effects enabled, which may cause graphical errors and performance issues in some cases.

This Unofficial Work in progress MVSPSP version adds cheat support without requiring UNIBIOS. Also adds support to UNIBIOS version 2.3 if you prefer.

The UNIBIOS 2.3 used must be downloaded from The Universe BIOS Official Homepage (google it), because other UNIBIOS modified won’t be recognized.

Thanks to dcemu.co.uk for the news.