And I feel as if Pokemon Trainer should be removed because it was a mess in the first place. Adding a trainer in the third installment, and having it be a first generation trainer during the fourth generation. And if I ever have to hear a trainer give commands in Smash again, I'm getting rid of my ears. Pokemon can fight on there own, they don't need a trainer in Smash.

But Rosalina's entire moveset revolves around having Lumas that can attack alongside her. They're not just one of her moves.

We don't know that yet. Besides, Rosalina's reveal trailer shows her directly attacking opponents multiple times. The Luma's role is somewhat like a hybrid of Nana and Olimar's Pikmin.

We DO know that because Luma is just about everywhere in the trailer.
Popo can be alone without Nana. Does that mean his moveset isn't based around Nana? Have you ever tried to Desync with one ice climber?

sakurai once said:
"zelda will not be returning into smash bros due to.. difficulties with her character. however, we have decided to replace her with a new namco character; klonoa. however, geno will not be making an appearance and instead, we will give you quote from cave story"

Rosalina's got height! She is seriously tall! However, she boasts an anti-gravity effect, so she's very light.