[original description]

Zomg, Koopas in the nude! Or almost. I guess it's more like a risque drawing, now. Silly me.

From left-to-right, then top-to-bottom, they are:

A Beach Koopa;
Koops;
A Koopatrol;
A Shady Koopa;
Another Beach Koopa (Although he was meant to be a Shellcreeper at first...);
The green Koopa Bro;
Kooper;
A Hammer Bro;
Parakarry.

I drew the Koopatrol with some sort of Chinese (or Japanese) sword despite the official art never depicting it with one. I just always felt it would go well with it, wot. Might also be my love for the Zelda franchise corrupting me... o.o

I went random on which Koopa Bro I'd draw, so don't be sad if you like the red, black or yellow better. :| So yeah, for whomever is wondering, my guess is that he had his share of cookies just then, and now he's content. Although he doesn't look like it much, to me...

Kooper is diving, yeah. I know what you're going to say, though: "Why's he not wearing a bathing suit?" Well, the answer is just: "Because."
Actually, I wanted to depict him face-planting hard, but midway through it I changed my mind and wanted to convey his more playful nature (that's how I see him). So now he's having a blast by watching bubbles. Hopefully he won't run out of them any soon. :oops:

Yeah... A whole week spent on that one. At least it was worth it... right? ^^;

All characters © Nintendo