I see where you're getting at now. As a Pokemon fan, the reason I support current-gen Pokemon in Smash is because I feel that the series deserves to be shown as a franchise that continues to... grow (had to stop myself there
). Especially since its success has yet to falter considerably, and is even considered a cultural thing in Japan now. If the Pokemon roster has predominantly Gen 1 Pokemon, I think it sends the wrong message about the franchise.
It's the reason I was a full supporter of Lucario back in pre-Brawl, even if it meant Mewtwo hypthetically had to be removed to make room for him (I know that probably wasn't the case but I'm sure I'm still going to get a lot of flack for that). I just disagree with the notion that Pokemon was only good back then, especially as an avid player of the games. Smash 4 should contain elements of the latest Pokemon generation, and if Gen 6 is released before Smash 4, then it wouldn't be right to exclude Gen 6 content from a prominent role (read: playable character).