@Olijolly- It's already been discussed why Ninetales isn't S tier. We all know how deadly chlorophyll sweepers and sun boosted fire moves are, but Ninetales herself is just mediocre. She's not like politoed in the slightest. Politoed is a very solid defensive pokemon that has great typing and utility in things like Encore, Refresh, and Perish Song. It also easily runs more offensive sets that are equally good.
@gengarsnemesis- Lucario doesn't deserve to be placed that low at all. It's a really solid pokemon, with admittedly subpar speed, but it easily makes up for that with extremespeed. It's faster than most things it wants to close combat anyway. The things that it doesn't outspeed are typically frailer and are going to be ko'd after a +2 extremespeed anyway, especially if they're weakened (which is typically going to be the case, since lucario is a late game sweeper). You're grossly exaggerating the amount of support lucario needs in order to be successful.
@IsTheCakeReallyALie- The fact that Garchomp used to be uber isn't a justification for it being placed in S tier. If you played during the time Garchomp was OU, you would realize that the sole reason Garchomp was banned because of its Sub SD set with Sand Veil