Vad ca am stiut gresit, am crezut k NNID e acelasi chestia cu eshop id. Intradevar poti sa accesezi eshop fara NNID. Topicul asta explica tot:
Is a Nintendo Network ID Required to Use Online Features? | Nintendo Support

Cit despre intrebarea ta:
What Happens to My Nintendo eShop Purchases When I Link a Nintendo Network ID? | Nintendo Support

Amu ma gindesc de ce m-am obosit sa-mi fac NNID :-)