Clearing the mailbox (Japanese Crystal) (request)
In Japanese Crystal, the mail box might become corrupted due to glitches. The memory address which controls the number of mail in the PC is A7F8. You can clear the mail box using arbitrary code execution (note: this assumes you already know how).
For example, you can get a bad clone with cloning and get a wrong pocket TM15 (e.g. this method https://archives.glitchcity.info/foru... but in step 11 have a Moon Ball at the top (will give you 165 items in the inventory), and have TM15 in the player's PC to access it later in the Balls pocket) by changing expanded Balls pocket 163 and 164) to Star Piece x 252 to run code from box 4 name character 2.
These are the bytes for the code, but I haven't been able to render them as box name characters yet, sorry.
3E 0A EA 00 00 3E 00 EA 00 40 3E 00 EA F8 A7 C9