- Via Wireless - Via Internet - Via Infrared - Via Code
We can obtain Mystery Gift Pokemon by entering codes! This means that Pokemon available this way would not be limited to "the length of the offer" and so you could buy the game 10 years later and still obtain that Pokemon.
Not to mention that if (and when) the game is hacked and all the codes are discovered, it'd be like we were all audience members at a taping of Oprah.
"You get a mystery gift, and you get a mystery gift, and you get a mystery gift, and you get a mystery gif!" --- ...and he was never heard from again.