Hello, I have found some little issues:
EMERALD
In my old cartridge save I named a Poochyena KIKI (don't ask me why, I can't remember) and it is marked as illegal... I don't know if it is a bad word in some languages (in italian it isn't), but I don't remember a word filter in third gen games.
261 - KIKI - B5C063DB9A04.pk3
BLUE (Virtual Console)
I have the italian version of this VC game, but all my Pokèmon are shown as english
LEAF GREEN
Here I find issues with two in-game trade: the first is an easy one, but the second is very very strange...
The Jynx called ZYNX has DONTAE as OT, but this OT name is marked as wrong... PKHeX recognizes RINO as the legit OT, but it is not
124 - ZYNX - 70DF498A2E1D.pk3
The Farfetch'd named CH'DING, with ELYSSA as OT, is initially marked as legal (images 1,2 ,3)
if you click on the green flag, it turns into the red triangle saying that the nickname has been altered, but it was not (image 4)
now if you set the Pokèmon with the red alert in an empty slot and then you view it, its name will be only C (images 5, 6)
the strange thing is that when I try to save the .pk3 of the first one (when it is still marked legal), the suggested file name is 083-C-AD29151943D7 snd not 083-CH'DING-AD29151943D7 (image 7)
obviously, importing that .pk3 file back, the nickname will be C
083 - C - AD29151943D7.pk3