In the latest build 20170702, there still seems to be Legality Bug with Gen 3 Pokemon (My Faraway Island Mew In Particular).
If I use Past Build 20170424 (Attached File), It shows it as Legal. Should I use this PKHEX build 20170424 to check on legality of Gen 3 Pokemon?
PKHeX.exe
151 - Aura - 55E0EE863292.pk7