I Earth King Amaimon I
ninja-no-ryu
Well the Tsubasa sponsor items from way back when are still able to be bought and sold by everyone, even though the actual sponsor stuff to get the items were limited to those in the US.
I'm assuming these items will be treated the same way.
I'm not a US citizen and I got the Tsubasa stuff back then. All you had to do was find feathers on the site pages. Unless there was another event after that which I missed out on and don't know it.
There were a few items from that sponsor... I don't remember exactly which went to what activity. But I think there were a few videos as well as the feather activity, and I remember there being complaints about it being US only... or at least localized to certain areas....
Honestly it was so long ago I don't remember much.