My friend and I were having a Pokemon battle the other day. I was playing on my retail version of SoulSilver and he was playing his back-up copy of Pearl on his R4. After getting my butt kicked by a suspicious amount of level 100 Pokemon, I asked him if he was using cheats (999 rare candies, easy leveling up, etc.). Of course, the answer came back "yes". I quickly shut off my DS before saving, as I had hoped not to get an unfair loss on my record. After some deliberation, however, I started to wonder if there was any way his cheats could have made it into my game. I'm personally against cheating, so the thought of me playing the game unfairly was enough for me to stop playing Pokemon for a while. So my questions are: Is there anyway that his cheats could have made their way into my single-player game? Will I have an unfair advantage when playing online? P.S Sorry if these questions sound odd, but I have OCD.