I actually sort of disagree. Every generation there seems to be a few lazy pokemon designs, and I feel that in their quest to reach over 100 different designs each time they ran into some problems. Examples are from every generation, from the first generation tendency to just use multiple of the previous evolution as a second second evolution (diglett to dugtrio, magnemite to magneton) and sludge piles to the fifth generation's infamous use of trash and ice cream cones. Not to mention they still just added multiple, larger gears to the klink line. Lazy designs aren't exclusive to any generation, but at the same time it would be false to say that they've never had at least some trouble coming up with new ideas to put into each game. But then after they release that game, they have a bunch of time again to continue working with designs which didn't make the cut that time around as well as to create entirely new and well-thought out ones.