What Is SCP-000?

Are there any other good hidden SCPs like these two? They were a fun easter egg but now I'm wondering if there are any others I missed the first time I read

SCP-000-U ''A New Beginning'' - Imgflip

Scp 000 GIF - Scp 000 - Discover & Share GIFs

scp 000 Discover

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If SCP-000-J had a online shop : r/SCP

SCP-000 Ending (maybe) ''Grim Reaper'' - Imgflip

Memetic Language, SCP Fanon Wiki

Once Human on X: 457-4 Siren During my recent expeditions, I was frequently tormented by the haunting echoes of raspy whispers. However, this time, the sinister symphony intensified, accompanied by quivering

SCP-000 iPad Case & Skin for Sale by Yu-u-Ta

Scp-000 #%%$@#@, Wiki

SCP 000 The Pattern Screamer-It's the strongest SCP(SCP Animation)