I was going to make this a poll, but there are only 6 possible options available and there are 7 Koopalings.

My personal favourite is pretty obvious...

He has an awesome name, awesome hair, he's a mad genius, often the hardest to beat in the games...

and in NSMBW LUDWIG'S VOICE IS AMAZING!

I hope to see them continue to be used in future Mario games - I'd love to see them make an appearance in Galaxy 2 but deep-down I know this is very unlikely.

Ludwig, of course.

Roy koopa, Because he has gender issues. For a serious answer i will have to replay the battles for each character because I can't remember most of them.

Roy.

Pink doorag, pink shell, pink shades.

This rastari clown has no idea what he's talking about. It takes a lot more than the color pink to have gender issues.

Ludwig: it's the hair, chicks dig the hair.

Flutter jumping? FTW? It's like his hair is a set of wings or something.

Larry is my favorite of the children after Junior of course. Back in Super Mario World, Despite Iggy's epic failure in Castle #1, Larry insisted on copying his battle pattern of the tilting platform in the middle of a fire field in Castle #7.

Iggy.

Lemmy, never ceases to frustrate me.

I was going to pick Roy too...fuck it. I'm picking Roy. None of the other ones have badass shades.

Ludwig, i like his hairs and the color of his magic!