Ask SCP-999~!! by DillyDraws on DeviantArt

ArtStation - SCP 999

Hypothetical: SCP 999 has gone missing from containment. How does the SCP foundation attempt to recover him? - Quora

SCP-999, Wiki

The Diary of SCP-999 - SCP-6666 - Wattpad

Steam Workshop::kSCP

SCP-999 Tickle Monster Vinyl Sticker – Newscape Studios

Scp-999 by 7greenTears on DeviantArt

SCP-999] The Tickle Monster - SCP: End of Magic - Official Card Game

Slime Plush SCP Plush Set, 15.8'' SCP 096 Plush, 8.5'' SCP 999 Plush Horror Scary Plush Toy Doll for Kids (Set) : Toys & Games

Slime Plush SCP Plush Set, 15.8'' SCP 096 Plush, 8.5