We’ve been getting an increasing number of bug reports regarding this issue and thought it a good idea to put this message out.
Players of Pokémon Prism on Analogue Pocket have been reporting save corruption issues. We have investigated and found the problem is with the Pocket itself, as software emulators and official hardware are unaffected. This issue can cause irreversible data loss and damage up to and including the loss of all Pokémon in your PC Box. This corruption remains even if you use the game pak on another console or boot it up in an emulator.
We would therefore advise players on Analogue Pocket to back up their save files immediately or, if playing on carts that cannot be backed up, stop using the console until Analogue issues an update to fix this bug. Official, non-Japanese Pokémon games do not appear to be affected, however, this may affect other Pokémon game mods like Prism.
Analogue should be able to fix this issue with an update to the console. We’ll let you guys know when or if that happens and when it is safe to play Prism on the console again. Hopefully soon.
Update (6 Dec): So far, we have only seen the issue affect cartridges. Methods like Everdrive, EZ-FLASH Junior and openFGPA so far do not be affected. However, we do still recommend backing up your save files frequently while using the console, as other issues may occur. An update to the Pocket is due soon – we will be testing this thoroughly and will report back. Please continue to report issues to us using our bug report form.