Beloberto
Bug Catcher
It depends on whether you consider Ultra Beasts legendaries, since they are basically the exact same thing (570 BST, signature ability shared by the group, can be caught more than once).I don't think they do, it seems you can catch multiple paradox so they may even be roaming free in the map
Their abilities can only be triggered if they are holding a certain item and in a certain weather/field condition, so it seems GF took caution for them to not be as broken as the UB, but overall is the exact same thing.