wavestate native is compatible with all sounds for the wavestate hardware. You can import Performances, Programs, Wave Sequences, etc. using the plug-in's Librarian window.
Also, you can import samples using the separate Sample Builder application, which can be downloaded for free:
There are various sets of third-party sounds and samples available for the wavestate and wavestate native. For recommendations, you might check out wavestate users groups, such as those on Facebook, or discussions on the Korg Forums, Gearspace, KVR, or your favorite music forums.