DOCTOR MEOW :O

Overall
DOCTOR MEOW CAUSED RESONAN CASCAD!!!!!!!! IT WAS HIM ALL ALONG! Lost in black messa.

History
Doctor meow appeared in 200 B.C. and he caused all kinds of chaos before he was locked in a picture frame during the fall of the roman empire. He was dug up in the eightis (80s) during a big digging archeology thingy. After that he was transported to Black MESSA and he was put on a wall next to "ben frank" and "albo onestone". He used his psychic abilities during hl1 to cause the resonance cascade. Some time after that a swedish dum-dum poopoo head was running through the hallway and he saw doctor meow. He somehow knew that the cato had something to do with the disaster. He got lost after the swede was captured by the HECU. Doctor meow was replaced by some copy of him and the copy was carried to xen. It is unknown where the riel doctorr mieow is now.

Conclusion
This fits perfectly for an scp monster.