[late] holy balls Az that Mesprit is so excellent. [/late]
The way its pink hair-tendrils look kind of like Cradily are definitely a funny touch, but the best part about it is definitely the loops in its tails. They look so smooth and refined, yet pretty natural at the same time. I also love the way they make Mesprit look like it's having fun (mirroring the female trainer) despite the fact that its right eye seems to be curved in a bit of an angry expression.
The female trainer is absolutely awesome as well, and while I definitely like her shoes the best part of that for me is easily the detail you put in concerning the music player (iPod, w/e). The earbuds and musical notes coming from them are excellent (I especially like the way she's holding them!) but the fact that the cord appears to loops around her entire body and then end at a mostly hidden (behind her hair) iPod in her pocket is just showcasing the incredible things that come with detail! I'm a huge fan of that picture.
As for the most recent one, I don't have too much to say, but I really enjoy the blending that the black appears to create between the heads! It's a cool thing to look at. The tiny person above the woman's head (who I didn't see for a few minutes!) is also pretty cool! Getting that amount of detail into something so small (though I'm assuming you did this on a larger canvas, haha) is pretty nice. :)