Well, ignoring the part of the bad englysh I consider that's a good idea, it's so easy to get a gyarados (hail daycare), maybe can be level 50 + water stone or something like that.
dratini is really hard to get. And what kind of stone would fit a dragon type? Anyway There are like 6 ppl that i know of that has dragonite. including me. Why make it even harder to get it? Wouldnt be fair to those that have dratini currently and want dragonite.
what about all those that still have gya lvl 50+ 60-? ;D they will be screwed ? Cant use any attacks. Have to put in daycare till lvl 60. Or whatever level they choose! :S