Ah right, the Pinsir too. Though I don't think I ever used it... I used Scyther though. Because Scythes are awesome, and it's got scythes for arms.
My memory may just be flawed, (or I was too young to really realize) but you can get sun stones in the contest?
But because of those scythes, it can never hug someone...
And yes. The Sun Stone was the first prize in the original G/S/C, and will continue to be in HG/SS. Then, apparently, after you get the National Pokedex, other evolutionary stones get mixed in.