which build you mean with "Chinese version of 20-10"?
i'm testing with Citra-MSVC-2017-NO-OPTIMIZED-14-OCT-2017 and Citra+CC-MSVC_19_10_2017 and there is the same problem but only in the first part of battle(before attacks).
Thanks @drwhojan for the build (Citra+CC-MSVC2017_01_10_2017) with this i have perfect fps in pokemon sun/moon.
I have a question for you....i've noticed much longer loading times( for example before battles) and sometimes fps drop, can you tell me what's the problem and a possible fix?