Alright, I'm gonna be very blunt about this, and I mean, very blunt, and up front.
Most likely Pokemon will reach 1000, when they reach #666, the Pokemon will be just some ordinary Pokemon. Becuase of over religious people, if they see the Pokemon #666 with any little sign of evil in it, they will try to sue them, hands down. When Pokemon #777
comes out, like #666, it will be very ordinary. (for those of you who don't know, 777 is the opposite of 666, good)
Just think for about one meesly minute if Nintendo made a evil looking Pokemon for #666, just think. Mostly the christian's will be all in a hussy, but many other people to. It would be a gigantic mess, and worst of all, it would be bad publicity for Pokemon, seeing how more than half of the Pokemon gamers are children, parents would probably be very affended by that, especialy christian, and will stop their kids from playing the games. Now, I myslef was raised christian, but I see many problems with christians today. So I have my own beliefs. Also, I'm am not bagging on christians, but sieriously, come on, it would be a mess. Anyway, Pokemon will not, and I bet my life on this, they will not make a satanic Pokemon for #666. Even skipping the number, which one of you guys mentioned, would cause a lot of problems. People would be asking why did you skip huh, blablabla. Nintendo is just going to act like they don't even know anything related to 666, and just make an average pokemon. So, I repeat; Pokemon will not, and I bet my life on this, they will not make a satanic Pokemon for #666.
....but it would be awsome if they did! ^_^