As stated earlier, Therians and Legendaries have their own transfer slots. But how do these work? The simple answer is that they work almost no different from regular slot 1 and slot 2 RNGs… almost. Therians are RNGed as if they are gendered Pokémon that are in slot 2 with a gendered Pokémon in slot 1 (although there really isn’t one there). Therefore, you can use the short form of the slot 2 equation given above without any problem. The “4th Generation Mascot” Legendaries are even simpler than Therians. They behave exactly like slot 1 gendered Pokémon, making the matter almost trivial. However, it must always be remembered that unless you back up your Dream Radar save file and have multiple Black 2 or White 2 game cards (or are willing to restart them), you only have one chance to RNG each of these. Hence, you should never under any circumstances transfer any other Pokémon with these Therians and Legendaries, since it has not been researched how other Pokémon affect the special transfer slots, nor has it been attempted to transfer multiple special Pokémon at once.