>>79898930-Marvel, multiple times, most notably Reptile telling Mettle he was a meme (which he was at one point) and Ironman saying 4chan is one of the databases he can access thru his armor.
-A guy is seen browsing 4chan in the Second Equestria Girls Movie
-The /co/ Bottle in Motorcity
-MAD made a thundercats parody with a ton of memes, kinda counts?