>>50570181Any man-made ones like Porygon would be outlawed for a number of reasons. One being that creating your own pokemon through experimentation is dangerous or inhumane. This also extends to unofficial experimentation, so mons like Rotom and Ditto are also likely not allowed.
Definitely no ownership of legendaries.
Anything that could be considered a pest if spread around (something already done with animals today) would be regulated.
Spreading information regarding, possessing, or attempting to contact Ultra Beasts or their worlds in any way will result in "Termination of communication" with the individual(s).