A Sklyde is a Spooky Petpet available here or from the Shop Wizard for approximately 6,500NP. They were released on October 31, 2005.
They are available in a few other colours; Blue, Chocolate, Desert, Disco, Faerie, Glowing, Island, Pink, Rainbow, Robot, and Snow.
They won the PPL, or Petpet Protection League on week 254.
You can learn to draw a Sklyde here.