Except for one cat breed, which people have been working on for years now, to try to produce a truly hypoallergenic animal, the rest of animals are not hypoallergenic.
Now, 'some' animals seem to be more or less hypo than others and to different people. I have heard that some 'seem' to be less allergic to Gypsies, but I have no idea if this is true. The next person quite well might be very allergic to them.
The best way to proceed, is to spend time around any animal you intend to purchase and not listen to tales that they are hypoallergenic. Lots of the time, this hypo thing, is a selling gimmick.