The precursor to Mafia-Clefable? Or something entirely different?
Love the character development evident in the expressions you've given to each of the members of the Clef-family. Cleffa's innocent and joyful grin is a great way to convey the misunderstood message that the Cueball gives across with his big bike and big attitude. Clefairy acting like (s)he's transitioning between childhood and adulthood through the avenue of being a "cool kid" with shades and a toothy smirk is a really nice touch. Clefable's big-boss attitude that makes it look like a direct parallel to its trainer is a nice touch, and I'm a huge fan of the black eye (though the bandaged nose is also quite nice).
I love the small details, like the heart-shaped nose on the skull of the bike, and your tire treads are sicknasty. I've gotta ask, though, how come you made his feet so small? I know artistic license is a great thing and anatomy isn't necessarily the most exciting part of drawing, but the boots just seem way too tiny when contrasted with the bulk of his legs/thighs.
(Also what's with giving your male characters loop earrings? :P)
edit for clarity on boots comment: I know that nj likes to give characters diminutive extremities, it's just that this one seemed particularly excessive and I was wondering if there was any particular reason for that