There are far, far too many to list here; suffice it to say that for every popular, big hit movie be it rated G, PG or even for kids, there is a 99% probability that an X rated version exists or is in production, including porn versions of Disney films and cartoon shows. That has been the 'norm' since the 60's. Some are hysterical; some are pure garbage, just as with regular films whole some have become classics in their own right as with several X rated spoofs of many #1 movies at the box-office.
Try finding some and have some laughs!