Here's a fun thread where we make pictures sharing our opinions of which gen makes a certain pokemon look the best and why. We could get a lot of OC this way.

Here's the example/template to use. Just open up Paint, copy and paste the pokemon image from each Gen it appears in from the Serebii pokedex and stretch the image of the pokemon to be big enough before you write under it. Then write underneath each picture of the pokemon from each gen why it doesn't compare to the gen you think it looks the best in or/and also write positive qualities about it even though it isn't your favorite one. And make sure to really emphasize why you think this certain gen gives the best looking version of that pokemon.

I'm looking forward to seeing what kind of opinions pop up. Have fun.