Hybrid Skylanders are the new group of Skylanders that debut in Skylanders: Hybrids.
There are a total of 57 canon Hybrid characters. They have two elements, which is why they are Hybrids. The reason is because their exact element cannot be verified by Master Eon. Hybrids have equality in their two elements.
The Hybrid Skylanders are stationed at the Soulstorm Isles, the southern section of Skylands. Their main headquarters is located on Floating Spirit Isle. Though mostly cut off from the other islands, it gives the Hybrids and other visiting Skylanders some privacy from missions.