Hermès cologne.
Ryan Sheckler is mostly seen wearing Eithika's, one of his sponsors.
Cha Cha!!
Actually, he does not to use any cologne at all- preferring his own musky odours.
I know for a fact he likes CK Free
Hmmm. Good question. I don't know, but it must be something musky and manly. Try any cologne that isn't sweetly scented.