From what I have read, the length of a 3rd gen Pokemon's name influences how legal reads the Hometown and Country information. I know that nicknames of 10 characters give an 'Indeterminate' result due to lack of trash bytes. However, I am curious about another inconsistency I saw the other day.
I Pal Parked 6 Pokemon from the same Emerald OT/game to a Diamond game. 3 of the Pokes were nicknamed the uncapped version of their real names (e.g. Rayquaza instead of RAYQUAZA), and the other 3 had other nicknames. The only difference between the Pokes of the same species is the nickname (they are clones).
For the nicknames that were 10 characters, I got 'Indeterminate' as I would expect. However, for some of the other Pokes, the Country and Hometown were not just US/UK/AU, but rather the whole list (Including Japan, Spain, etc).
Is there some other trash byte related trend that causes this to happen?
Edit:
Latios ('Latios')
Country Originated: US/UK/AU
Pal Park Country: US/UK/AU
Latios ('AEROSTAR')
Country Originated: US/UK/AU
Pal Park Country: US/UK/AU, France, Italy, Germany, Spain/South America, Korea
Rayquaza ('Rayquaza')
Country Originated: US/UK/AU
Pal Park Country: US/UK/AU, France, Italy, Germany, Spain/South America, Korea
Rayquaza ('MEAN GREEN')
Country Originated: US/UK/AU
Pal Park Country: Indeterminate
Wynaut ('Wynaut')
Country Originated: US/UK/AU
Pal Park Country: US/UK/AU
Wynaut ('ITSATRAP!')
Country Originated: US/UK/AU
Pal Park Country: US/UK/AU, France, Italy, Germany, Spain/South America, Korea