First of all. Can you guys quit spamming. Post something worthwhile, or post nothing at all.
The reason for missignno messing up your game is mabye if you caught it. If you catch it, sometimes it will mess up your game quite a bit. Other times, you can just use it as a battling poke'mon. (fun, fun, fun) If you didn't catch it, I dunno what happened.
Trying to be more active, as I am part of the pokecorner forum as well.