I noticed a peculiarity related to Pokémon obtained as part of the Japanese Gather More Pokémon! Campaign.
Prior to 24.11.11, the PID type in this example using Cyndaquil (attached photos) was noted as BACD_R.
Post-24.11.11 update, the PID type is BACD [BACD_U_AX]. I am still working on my understanding of PID types in gen 3, but is this accurate and intentional?
My guess is that the origin seed in this example (0000BCFE) appears in both BACD_R and BACD_U_AX, and PKHeX isn't distinguishing between the two and defaulting to the latter?
The attached photos include the encounter/PID type and errors for the same Pokémon from the 24.07.27 and 25.02.23 releases of PKHeX. The sample save file I'm using can be found here.
This is my first forum post, so if this is better suited somewhere else I apologize.