The Koopalings need love
Yes, they do. Hell, one thing I've always entertained would be a Mario 2-style game, where Junior and his older brothers and sister were the various characters you could choose to play as. Each one would of course have their own individual play styles, and there could even be multiplayer for 2-4 people!
It'd be a nice way to unite the children of Bowser in one fell swoop, plus bring back characters that people have wanted to see for a while now. Why they weren't included in SPP, when sprites were available, and M&L1 brought them back in the fold, I won't understand. But hey, I'll be willing to excuse such a thing, if the Koopalings are brought back and soon. ^_^
....but who is their mother *looks suspicious at Kamek...if Kamek is female*
...Don't make me bring back my "Bowser" rant.
Any way, to put it bluntly, I think it's safe to presume that Bowser was probably so much of a pimp, the Koopalings and Jr probably came from multiple mothers, who could have served as Bowser's different flings, tricks and/or part of his royal harem.
But Bowser won't rest until he gets at dat WHITE GIRL (Peach)! Why else would he be willing to go through so much trouble, when the Koopa empire practically owns 75% of the known Mario-verse already? It's not like the Mushroom Kingdom offers THAT much in the way of viable real estate or resources, right...?