I was going to start a Mono-challenge in G/S/C, what's a good one to start. I wanted to do a Dark Challenge, but I would only have my Starter and Umbreon would be my only dark type. Then I would get Sneasel, but the Ice Cave. And Houndour and Murkrow come after I beat the Elite 4 for the first time. There would be no way to get Tyranitar, it would just take too long to evolve, it wouldn't reach the level's my other Pokes would have. Well, atleast Umbreon would be a REALLY high level, and Sneasel would next, and Murkrow and Houndoom would come in 2nd to last

I wanted to do an Ice Challenge. But that's another hard on.

What kind challenge do you I should do? Also, I will be doing this is in my Crystal Version, so will I have to look for Pokes in other places?