No design changes! Just new art.
You can still draw him with his natural colouration, as seen in the 2016 ref, I just tend to draw him in electric blueberry lime colours.

-5'4" and doughy
-labret spike piercing
-rectangular pupils
-has dewclaw hooves on wrists and heels
-innards are green. (unless you're doing natural colours, in which case, they're, uh, natural)
-should never be drawn with genitalia under p much any circumstances
-has really bad fashion sense
-hair swoops to his right (viewer left from the front)
-me like hockey (san jose sharks)