From some brief research it appears this is a hacked version of Action Replay 4.2 Pro. According to the Action Replay wiki this doesn't seem unusual:

"There are several sub-versions of the english 5.2, but they strangely enough appear to be changes from the 4.2 versions without the major code update which happened towards the official 5.0 version. This seems to be partly caused by incorrect or confusing numbering from Toolkit and fastload version numbers."

Here we have a hacked version of what appears to be the Action Replay v5.0  (.CRT) cartridge.  All mods apparently by Bacchus of Fairlight in 1989.

Action Replay by Datel in 1989 - This archive is a .CRT cartridge image which works with the VICE emulator.

Wow, go figure, TRIAD had to release a hacked version of Action Replay v6.0, how cool is that?!? NOT.

Action Replay .CRT Cartridge 7.0 by Triumwyrat Studio in 1990 - Can't find any info on what's new about this cart, so it's likely some 10 year olds hack to replace the version info.

Another hacked version of the Action Replay cartridge.