Glitched Black

I had just gotten a copy of Pokemon Black 2 for my 13th birthday. I turned on my DS, super excited to play. I shoved in the cartridge and pressed play. The intro was normal, however, I noticed there was already a save file. My character's name was apparently named Issac. I-I didn't understand, this game was brand new. How could there be a save? I shrugged it off and kept playing. I only had five Pokemon on my team, they were Serperior, Pikachu, Zebstrika, Sawsbuck, and Klang. So I had a pretty good team. I was in Mislatron city. I met my rival, James, outside of the gym. He said he wanted to battle me. His team was Cofagrigus, Maractus, Watchog and Zoroark (keep that in mind, it's going to be helpful later). I beat him in battle, then for some unexplained reason, my screen went black. Two words showed up on the top screen. They read, 'no escape.' Then, the screen turned back on, and I was in a Pokemon center. It was darker than normal, and when I tried talking to people, they all just said 'never the same.' I walked outside to Nimbasa City, and it was a mess. There were random jumbled lines of code in place of characters, I couldn't enter any buildings, etc. Every character just repeated 'never the same.' when I talked to them. Instead, I went back to the Pokemon center, and there was James, standing in front of the counter. When I talked to him, here's what he said. "well. hello there, Issac. i knew you'd return. that world out there is a jumbled mess of code, hm? this is what it's like in my world. i'm simply a secret in the code of this game. anyway, would you care for a battle? i'd love to see your Pokemon again." I chose to battle James, and he only had a Chandelure. It was Level 0. I was surprised. I thought level 0 didn't exist! I easily beat him, then the screen went black again. There were words on the top screen, reading, 'fatal error.' Just then, four silhouettes of Pokemon appeared on the bottom screen. They were Cofagrigus, Maractus, Watchog, and Zoroark. The same Pokemon that James had. Then, a new one appeared in the middle. Hypno. Then, the theme that played in N's room began to play. It went on for about 5 minutes or so, then the console shut off. Frightened, I took out the cartridge and put it up in my top dresser drawer, hoping to get the case to return it to the game store. The following morning, however, when I went to grab the cartridge, it was GONE. I lost my mind. How did it disappear?! I didn't even TOUCH the damn thing! However, in its place was a sticky note reading, 'free at last, but never the same.'