DIllusionist

This news has been bothering me a lot, seeing I still play the older games often and still compete and trade with friends via Wi-Fi. I was wondering; do normal trades and battles also require the authentication from the Nintendo Servers? In other words, would some sort of "redirecting both games to a common server hosted by either party" be something plausible or even possible?

I've heard that via trading, the other party can check the traded Pokémon with PokéSAV or a similar program to find out one's Secret ID. Would someone please do that for me? My Friend Code is: 5371-4901-9460 I would really appreciate the help. ^^;