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jormis29
Since: Mar, 2012
HarmoniousManatine
Since: Feb, 2016
aliceinoctane
Since: Oct, 2016

So basically it was a show that aired probably either on Cartoon Network or Teletoon. It was about this teenage kid who was friends with monsters and had to hide them because they couldn't be seen by the public. I believe there was a Frankenstein character, and he may have lived inside the teenager's bedroom closet?