Like Tears in Rain

[Zanreo]

1. Choose your medium. It may be a diary, an audio recording, even a dance, whatever.

Missingno will grab a camera of some kind and record a clip of themselves.

2. Outline a few things that will be recorded. (No need to be detailed right now).

They start recording, talking about who they are and how they know the world might not trust them, but even if they're a glitch they just want to live their life. They don't want themselves or anyone else to disappear, but if it were to happen, they ask to at least please remember them.

3. How will you keep this safe if you find yourself removed from the time stream? Get creative.

First off, copy the video to a thumb drive... then use their power to make a bunch of copies, so even if one gets lost there'll still be plenty of backups (maybe a bit too many, but oh well). They then get a bunch of boxes and split the drives into more or less equal amounts before putting them into these, attaching a note to each box saying "please open if Missingno disappears or you don't remember who they are" and put them in different places in their room.