Tiers are for queers? Wow, that's REAL mature.
They didn't make this up. It's commonly used to oppose tourney fanboys.
Tiers are based on usage. Those Pokemon are there usually because of bad typing, they are outclassed by another Pokemon, lack of a good movepool, they didn't get very many upgrades this generation, etc.
They aren't based on usage, they are based on what Smogon decides them to be. Don't try to tell me that more people use Salamance because they like it better than Dragonite.
Take Milotic for example. An EXTREMELY good Pokemon in the third generation. Did the fourth generation really give it any upgrades? No, not really. So it's not used as much.
It's used less because it didn't get anything new in Gen IV? Wrong. It's used less because other Pokemon got better moves, as well as the fact that most other bulky waters do a better job of sponging.
And I'm sick and tired of Karen's quote being thrown around. It actually was pretty cool at first, but with all the people using it in their signature to seem poetic or whater it just lost its value.
Irrelevant
Either way, good luck using a Beautifly against a Salamence.
Beautifly was designed for the metagame. It has a lower BST than Porygon, which evolves twice.
Comments in bold.