BizHawk SaveRAM file issues

[mcw4v3-x]

Saved games (*.SaveRAM) made in BizHawk won't load in PKHeX except for Pocket Monsters Aka/Pokemon Red.
e.g. Pokemon - Red Version (USA, Europe).SaveRAM
Pokemon Red save files made in BizHawk work in PKHeX but not the rest. BizHawk can play Pokemon games from Generations I thru V.

[Kaphotics]

PKHeX supports raw save data dumps.

If bizhawk has its own saved data format with appended information (similar to desmume), then the save file size is different. Can't be recognized unless the format is documented and the program updated to read it.

Double check that your save files are actually valid, and not empty save data (save in game).

[BlackShark]

BizHawk applies a 22 bytes footer, so 0x8016 bytes for Gen 2 saves. Other generations use raw saves.