1. Tyranitar
2. Blue, Yellow, Silver, Stadium, Sapphire, Emerald, Diamond, Pearl, Platinum, Pinball, Ranger, Heart Gold. Shut up.
3. On my first playthrough of Blue I got over 300. I did at least that my first time through Silver. I'm looking at over 1000 if I add in the time I spent on Smogon.com or playing people on Shoddy Battle (a Java program that lets you battle people on the PC).
4. I still play them. Not as much as two years ago but I pick them up on occasion. I can't wait for Heart Gold/Soul Silver to come out in America.
5. On Blue and Silver I got them all, without cheating I might add (I got Mew and Celebi in trades). On Emerald and Sapphire I got about 75/80% of them, and on Diamond I got about 60/70% of them.